generate_personal_summary · Kindle MCP: Risk & Policy

WHAT IT DOES

What generate_personal_summary does on Kindle

AI agents use generate_personal_summary to create or update resources in Kindle — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Kindle environment.

WHY IT NEEDS A POLICY

Why generate_personal_summary needs a policy

This tool creates and prepares structured data summaries destined for Notion (a write operation), though it stops short of directly pushing to the database—that role belongs to 'push_to_notion.' The creation of new personal memory summaries from source highlights constitutes a Write action: reversible data creation.

From the tool's definition The tool description states it 'Builds a prompt package' and is used 'when processing a single book manually,' implying preparation of data to be written.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_personal_summary Rate-limited

generate_personal_summary stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "generate_personal_summary": {
      "limits": [
        {
          "counter": "generate_personal_summary_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Kindle, so you can run agents against it safely.

FAQ

Questions about generate_personal_summary

What does the generate_personal_summary tool do? +

Builds a prompt package for the host model to generate a personal book memory summary from highlights alone. Use this when processing a single book manually. It is categorised as a Write tool in the Kindle MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generate_personal_summary? +

Register the Kindle MCP server in PolicyLayer and add a rule for generate_personal_summary: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Kindle. Nothing to install.

What risk level is generate_personal_summary? +

generate_personal_summary is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit generate_personal_summary? +

Yes. Add a rate_limit block to the generate_personal_summary rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block generate_personal_summary completely? +

Set action: deny in the PolicyLayer policy for generate_personal_summary. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides generate_personal_summary? +

generate_personal_summary is provided by the Kindle MCP server (silcfcr/kindle-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.