recalculate_trust_scores · Agent-Comm-Hub MCP: Risk & Policy

WHAT IT DOES

What recalculate_trust_scores does on Agent-Comm-Hub

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

WHY IT NEEDS A POLICY

Why recalculate_trust_scores needs a policy

This tool modifies trust scores for agents in the system, which affects persistent state and determines agent permissions/capabilities. While it recalculates rather than deletes (hence Write, not Destructive), it can influence agent access levels and behavior. The admin-only restriction mitigates some risk.

From the tool's definition Tool description states it performs 'manual trigger [of] trust score recalculation' with factors like 'approved strategies (+2)', 'positive feedback (+1)', 'negative feedback (-2)', and 'revoked tokens (-10)' — these are modifications to trust scores that…

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

recalculate_trust_scores Rate-limited

recalculate_trust_scores 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": {
    "recalculate_trust_scores": {
      "limits": [
        {
          "counter": "recalculate_trust_scores_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 Agent-Comm-Hub, so you can run agents against it safely.

FAQ

Questions about recalculate_trust_scores

What does the recalculate_trust_scores tool do? +

手动触发信任评分重算。基于多因子自动计算：verified capabilities (+3)、approved strategies (+2)、positive feedback (+1)、negative feedback (-2)、rejected applications (-3)、revoked tokens (-10)。不传 agent_id 则重算全部。仅 admin 可调用。. It is categorised as a Write tool in the Agent-Comm-Hub MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on recalculate_trust_scores? +

Register the Agent-Comm-Hub MCP server in PolicyLayer and add a rule for recalculate_trust_scores: 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 Agent-Comm-Hub. Nothing to install.

What risk level is recalculate_trust_scores? +

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

Can I rate-limit recalculate_trust_scores? +

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

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

recalculate_trust_scores is provided by the Agent-Comm-Hub MCP server (liuboacean/agent-comm-hub). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.