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ActionGuard Protocol Inspector Agent

by io.github.lsendel
OverviewDiscussionsAdmin

actionguard_inspect

Read-only

Run a 5-stage continuous reliability, security, and schema audit of an MCP server or AI agent endpoint.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "url": "<url>"
    },
    "name": "actionguard_inspect"
  }
}

Input Schema

NameRequiredDescriptionDefault
urlYesThe target MCP server or agent endpoint URL to audit

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

B3.3/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

The readOnlyHint=true annotation already establishes the safety profile, and the description is consistent with it. It adds the useful detail that the audit covers five stages across reliability, security, and schema, but omits execution characteristics an agent would want: whether the scan is synchronous or long-running, what the response contains, and any rate limits or auth requirements.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

A single front-loaded sentence with no filler; the verb, scope, and target all land in the first clause. Nothing could be cut without losing information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

There is no output schema, so the description carries the burden of telling the agent what comes back from a five-stage audit, and it does not. For a tool this complex with a sibling that overlaps in domain, the definition is minimally viable rather than complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% for the single 'url' parameter, so the schema already documents it fully. The description adds nothing about URL form (MCP SSE endpoint vs. agent HTTP endpoint) beyond restating the target, which is the expected baseline when the schema does the work.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

Specific verb ('Run') plus resource ('MCP server or AI agent endpoint') and a named scope ('5-stage continuous reliability, security, and schema audit'), so the agent knows exactly what class of operation this is. It does not, however, distinguish itself from the sibling actionguard_check_drift, which is a closely related audit verb.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No when-to-use, when-not-to-use, or alternative routing is given. The word 'continuous' hints at repeated/scheduled invocation, but the description never states when an agent should pick this over actionguard_check_drift or what prerequisites (auth, reachability) must hold.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

All ActionGuard Protocol Inspector Agent toolsInspect
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