bob_thinking_trajectory

THE RISK

Low Risk

Why bob_thinking_trajectory needs a policy

This tool retrieves and displays historical information about how thinking on a topic has evolved over time. It queries existing indexed data without creating, modifying, deleting, or executing any external operations. The blast radius of misuse is minimal—an agent could only access conversation history it may already have access to, with no side effects beyond reading indexed content.

From the tool's definition Tool description indicates it performs a chronological retrieval/query operation ('Chronological pass on a topic — first mention to most recent') on indexed conversation history.

Documented attack patterns abuse exactly the kind of access bob_thinking_trajectory gives an agent:

POLICY

How to control bob_thinking_trajectory

PolicyLayer is an MCP gateway — it sits between your AI agents and Brain, and nothing reaches the server without passing your rules. This is the rule we recommend for bob_thinking_trajectory:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "bob_thinking_trajectory": {}
  }
}

bob_thinking_trajectory is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Brain — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

Related tools and policies

More Brain tools

Read bob_dropped Inspect what L1 filtered out. Optional reason filter (e.g. 'cc:build-log-paste'). Read alignment_check Check if a decision aligns with your principles. Read bob_conversations_by_date List all conversations active on a given date (YYYY-MM-DD). For each Read bob_health Report the state of Bob's local memory. Use this first if you don't know Read bob_recent Most recent turns within the last hours. Filter by src and/or role. Read bob_search bob_search Read bob_tunnel_state Reconstruct work-in-progress on a domain/topic. Returns the most recent Read bob_what_do_i_think Surface the user's own positions on a topic. Filters to role='user' turns

All 34 Brain tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about bob_thinking_trajectory

What does the bob_thinking_trajectory tool do? +

Chronological pass on a topic — first mention to most recent. Shows how. It is categorised as a Read tool in the Brain MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on bob_thinking_trajectory? +

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

What risk level is bob_thinking_trajectory? +

bob_thinking_trajectory is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit bob_thinking_trajectory? +

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

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

bob_thinking_trajectory is provided by the Brain MCP server (mordechaipotash/brain-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Brain tool call.

Start from Brain, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →