edit_block_text · Mnemosyne MCP: Risk & Policy

WHAT IT DOES

What edit_block_text does on Mnemosyne MCP

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

WHY IT NEEDS A POLICY

Why edit_block_text needs a policy

The verb 'edit' combined with 'text' in a knowledge graph management system indicates data modification rather than destruction or execution of arbitrary operations. This is a Write operation because edits are typically reversible. Medium severity reflects that modifying knowledge graph blocks could affect dependent queries or operations, but the impact is constrained to text blocks rather than entire records.

From the tool's definition Tool name 'edit_block_text' indicates modification of text blocks; no description provided to confirm scope or reversibility. Context from sibling tools (create_graph, create_wires, delete) suggests this server manages knowledge graph data structures.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

edit_block_text Rate-limited

edit_block_text 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": {
    "edit_block_text": {
      "limits": [
        {
          "counter": "edit_block_text_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 Mnemosyne MCP, so you can run agents against it safely.

FAQ

Questions about edit_block_text

What does the edit_block_text tool do? +

edit_block_text. It is categorised as a Write tool in the Mnemosyne MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on edit_block_text? +

Register the Mnemosyne MCP server in PolicyLayer and add a rule for edit_block_text: 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 Mnemosyne MCP. Nothing to install.

What risk level is edit_block_text? +

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

Can I rate-limit edit_block_text? +

Yes. Add a rate_limit block to the edit_block_text 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 edit_block_text completely? +

Set action: deny in the PolicyLayer policy for edit_block_text. 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 edit_block_text? +

edit_block_text is provided by the Mnemosyne MCP server (sophia-labs/mnemosyne-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.