Semantic search across task lines (- [ ] / - [x]). Filter open/done/all.
AI agents call find_similar_tasks to retrieve information from brainMD without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and searches existing task data based on semantic similarity. It has no side effects—it does not create, modify, delete, or execute any operations. The filtering mechanism (open/done/all) is purely a read-time filter. Blast radius is minimal; misuse would only expose task information already stored in the vault.
From the tool's definition Tool performs 'semantic search across task lines' with filtering options. The description indicates query and retrieval operations only, with no mention of creating, modifying, deleting, or executing external operations.
Documented attack patterns abuse exactly the kind of access find_similar_tasks gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and brainMD, and nothing reaches the server without passing your rules. This is the rule we recommend for find_similar_tasks:
{
"version": "1",
"default": "deny",
"tools": {
"find_similar_tasks": {}
}
}find_similar_tasks is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Semantic search across task lines (- [ ] / - [x]). Filter open/done/all. It is categorised as a Read tool in the brainMD MCP Server, which means it retrieves data without modifying state.
Register the brainMD MCP server in PolicyLayer and add a rule for find_similar_tasks: 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 brainMD. Nothing to install.
find_similar_tasks is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the find_similar_tasks 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.
Set action: deny in the PolicyLayer policy for find_similar_tasks. 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.
find_similar_tasks is provided by the brainMD MCP server (mi4uu/brain.md). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from brainMD, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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17 brainMD tools catalogued and risk-classified — across an index of 43,000+ MCP servers.