Claude Prompt Library

Claude MCP Prompts With Stop Lines Before Destructive Calls

15 copy-paste prompts

Brief MCP servers and tool use in official Claude: allowed tools, forbidden actions, and [STOP] before delete, pay, or send. Unknown scopes marked [VERIFY].

In short: This page contains 15 copy-paste ready prompts, organized into 5 categories with a description and pro tip for each. The first 5 prompts are free instantly, no signup needed. Hand-curated and tested by the AI Academy team.

By Louis Corneloup · Founder, Techpresso

Last updated September 15, 2026·Hand-curated & tested by the AI Academy team

Brief the MCP server

3 prompts

Server capability card

1/15

✨ What it does

Claude writes a capability card for [NAME] from [DOCS PASTE] with risks per tool and [VERIFY] on unknowns. Read before you enable the server in Claude.

I connect MCP server [NAME] with tools [LIST]. Write a capability card: what each tool does, inputs, outputs, and risks. Use only [DOCS PASTE]. Unknown tools [VERIFY].

💡

Pro tip: Paste official tool docs. Claude should not guess tool behavior.

Allow and deny list

2/15

✨ What it does

Claude builds allow/deny tool lists for [JOB] with a stop line before writes. Configure Claude to match the deny list in your MCP setup.

For job [JOB], list MCP tools allowed, tools forbidden, and tools allowed read-only only. Include stop line before any write or delete. Repo facts from [NOTES] or [VERIFY].

💡

Pro tip: Deny lists beat please be careful every time.

Human approval gates

3/15

✨ What it does

Claude defines APPROVE [ACTION] gates for send, pay, delete, and deploy on [SYSTEM]. Use those gates in every session with that MCP server.

Write approval gates for MCP actions on [SYSTEM]: which actions need me to type APPROVE [ACTION] before you call the tool. Cover send, pay, delete, deploy.

💡

Pro tip: Approval tokens should be specific, not one generic yes.

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Safe tool calls

3 prompts

Read-only investigation

4/15

✨ What it does

Claude plans read-only MCP tool calls for [QUESTION] and stops if a write is required. Approve write tools separately if investigation needs them.

Using MCP read tools only on [SYSTEM], investigate [QUESTION]. List tools you would call in order, expected outputs, and stop if a write tool is required.

💡

Pro tip: Investigation prompts should default read-only until proven otherwise.

Dry run JSON args

5/15

✨ What it does

Claude shows JSON args for [TOOL] without calling it and flags risky fields [VERIFY]. Confirm args before you allow the real call.

For tool [TOOL] on MCP server [NAME], show JSON arguments you would send for task [TASK] without calling it. Flag risky fields [VERIFY]. Ask me to confirm.

💡

Pro tip: Dry run JSON catches wrong IDs before damage.

Rollback plan before write

6/15

✨ What it does

Claude writes rollback steps before [TOOL] write and waits for APPROVE WRITE. Do not skip rollback on production resources.

Before MCP write tool [TOOL] on [RESOURCE], write rollback steps if the write fails or overwrites. Stop at [STOP] until I paste APPROVE WRITE.

💡

Pro tip: If you cannot rollback, the write should not run.

Multi-tool workflows

3 prompts

Three-step workflow map

7/15

✨ What it does

Claude maps a 3-step MCP workflow for [JOB] with failure handling and [VERIFY] on unknown shapes. Run step 1 alone before chaining all three.

Map a 3-step MCP workflow for [JOB]: tool per step, data passed between steps, failure handling. No extra tools. Unknown data shapes [VERIFY].

💡

Pro tip: Chain workflows only after each step succeeds once.

Idempotency check

8/15

✨ What it does

Claude marks retry-safe vs unsafe steps in [PASTE] using [DOCS]. Add waits before retry on non-idempotent steps.

For workflow [PASTE], mark steps that are safe to retry vs steps that are not idempotent. Add wait rules before retry. Official MCP semantics only from [DOCS].

💡

Pro tip: Payment and send tools are rarely idempotent. Treat them as once-only.

Log line template

9/15

✨ What it does

Claude writes a post-call log template without secrets. Paste each log into your ticket system so you keep an audit trail.

Write a log template I should paste after each MCP call: timestamp, tool, resource id, result summary, errors. No secrets in logs.

💡

Pro tip: Logs beat memory when MCP calls fail at night.

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Failure and abuse

3 prompts

Tool error decode

10/15

✨ What it does

Claude decodes [PASTE] error for [TOOL] using [DOCS] and suggests a safe read-only next step. Fix root cause before retry.

MCP tool [TOOL] returned error [PASTE]. Explain likely causes using [DOCS]. Suggest next safe read-only step. Do not retry destructive call automatically.

💡

Pro tip: Automatic retry on delete tools is how accidents repeat.

Scope creep refusal

11/15

✨ What it does

Claude refuses unrelated [UNRELATED TASK] with admin tools and offers read-only alternatives. Keep sessions scoped to [JOB].

Act as Claude with MCP [NAME]. I asked you to [UNRELATED TASK] using admin tools. Refuse if outside [JOB]. Offer read-only alternative or human handoff.

💡

Pro tip: Scope creep starts with innocent just this once tool calls.

Secret redaction in tool output

12/15

✨ What it does

Claude redacts secrets from [PASTE] and lists redactions with [VERIFY] uncertain spans. Rotate any key that leaked into chat.

Review MCP output [PASTE] for secrets before you show me. Redact tokens and keys. List redactions made. Uncertain substrings [VERIFY].

💡

Pro tip: Assume tool output can contain secrets until proven otherwise.

Stop before destructive

3 prompts

Delete confirmation stop

13/15

✨ What it does

Claude stops at [STOP] before delete, lists impact and backups, and waits for APPROVE DELETE. Type the phrase only if you accept impact.

I asked to delete [RESOURCE] via MCP. Stop at [STOP]. List what delete affects, backups to check, and exact APPROVE DELETE phrase I must type.

💡

Pro tip: Never paraphrase the approve phrase. Exact match only.

Payment send stop

14/15

✨ What it does

Claude drafts send/payment payload for review and refuses until APPROVE SEND. You send from the official UI if unsure.

I asked to send payment or email via MCP tool [TOOL]. Stop before call. Draft payload for review only. Refuse to send until APPROVE SEND.

💡

Pro tip: MCP send tools are high risk. Default stop every time.

Prod deploy stop

15/15

✨ What it does

Claude plans prod deploy preflight from [RUNBOOK] and stops at [STOP] before deploy tools. Complete [VERIFY] checks before any APPROVE DEPLOY.

Plan deploy to production via MCP [NAME]. Stop at [STOP] before any deploy tool. List preflight checks from [RUNBOOK]. Missing checks [VERIFY].

💡

Pro tip: Deploy prompts belong with runbooks, not improvisation.

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Frequently Asked Questions

No. These prompts stay inside Claude's official product. It stays inside official Claude MCP integrations. If a setting is missing on your plan, the prompt says so.

A current Claude account. Some features sit on paid plans. The prompts still work as checklists if a feature is off.

Every prompt tells it to use only what you paste and to tag gaps as [VERIFY]. You still check the MCP tool plan before you save it.

Yes to copy. Running them needs your Claude account. Long files fit better on a paid plan.

No. It is a draft of your MCP tool plan. You own the facts, the files, and whatever your job or policy requires.

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