call_api_by_swagger · MCP: Risk & Policy

WHAT IT DOES

What call_api_by_swagger does on Mcp

AI agents invoke call_api_by_swagger to trigger actions in Mcp. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why call_api_by_swagger needs a policy

This tool triggers external API operations dynamically based on operationId arguments. The actual effect (read, write, delete, financial) depends on which Swagger operation is invoked, making it potentially span all categories.

From the tool's definition 'Call a Swagger operation by operationId' - executes arbitrary API operations defined in Swagger/OpenAPI spec; effects depend entirely on which operation is called

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

call_api_by_swagger Rate-limited

call_api_by_swagger stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "call_api_by_swagger": {
      "limits": [
        {
          "counter": "call_api_by_swagger_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mcp, so you can run agents against it safely.

FAQ

Questions about call_api_by_swagger

What does the call_api_by_swagger tool do? +

Call a Swagger operation by operationId. Auth header is injected automatically from MCP session. It is categorised as a Execute tool in the Mcp MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on call_api_by_swagger? +

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

What risk level is call_api_by_swagger? +

call_api_by_swagger is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit call_api_by_swagger? +

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

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

call_api_by_swagger is provided by the MCP server (victormyschik/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

call_api_by_swagger is one line of 's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

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