d_ann_config · Heuristic MCP: Risk & Policy

WHAT IT DOES

What d_ann_config does on Heuristic

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

WHY IT NEEDS A POLICY

Why d_ann_config needs a policy

An AI agent can call d_ann_config faster than any human can review — one bad instruction and it creates or modifies resources in Heuristic by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

d_ann_config Rate-limited

d_ann_config 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": {
    "d_ann_config": {
      "limits": [
        {
          "counter": "d_ann_config_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 Heuristic, so you can run agents against it safely.

FAQ

Questions about d_ann_config

What does the d_ann_config tool do? +

Configure and monitor the ANN (Approximate Nearest Neighbor) search index. Actions:. It is categorised as a Write tool in the Heuristic MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on d_ann_config? +

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

What risk level is d_ann_config? +

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

Can I rate-limit d_ann_config? +

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

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

d_ann_config is provided by the Heuristic MCP server (softerist/heuristic-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.