Medium Risk

recommend_servers

Recommend MCP servers for a plain-language task and return ranked matches with install config.

Part of the MCP Verify server.

recommend_servers can modify MCP Verify data, with no limits today. PolicyLayer puts allow, deny, and rate-limit rules on every call. Live in minutes.

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AI agents use recommend_servers to create or modify resources in MCP Verify. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.

Without a policy, an AI agent could call recommend_servers repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach MCP Verify.

Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "recommend_servers": {
      "limits": [
        {
          "counter": "recommend_servers_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

See the full MCP Verify policy for all 22 tools.

Get this rule live on your own MCP Verify server in minutes. PolicyLayer enforces it on every call, before it runs.

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These attack patterns abuse exactly the kind of access recommend_servers gives an agent. Each links to the full case and the policy that stops it:

Browse the full MCP Attack Database →

Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so recommend_servers only ever does what you allow.

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Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.

What does the recommend_servers tool do? +

Recommend MCP servers for a plain-language task and return ranked matches with install config.. It is categorised as a Write tool in the MCP Verify MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on recommend_servers? +

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

What risk level is recommend_servers? +

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

Can I rate-limit recommend_servers? +

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

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

recommend_servers is provided by the MCP Verify MCP server (https://verify.sentinelsignal.io/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Verify tool call.

Deterministic rules across all 22 MCP Verify tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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4,600+ MCP servers and 31,000+ tools scanned and risk-classified.

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