mcp-toolbelt

ssl_labs_grade

Full SSL Labs-style TLS assessment: overall letter grade, protocol support (TLS 1.0-1.3), cipher strength, certificate chain issues, and known vulnerabilities (Heartbleed, POODLE, etc.) for each endpoint. Use this for a deep grade; use ssl_cert_check instead for a fast expiry/issuer check. Slower (can take up to ~90s on a cold cache; SSL Labs caches results for 24h server-side).

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": {
      "hostname": "<hostname>"
    },
    "name": "ssl_labs_grade"
  }
}

Input Schema

Name	Required	Description	Default
`hostname`	Yes	Hostname to assess, e.g. example.com (no scheme/path)

Schema Changelog

Changes observed during successful MCP inspections.

First observedAug 31, 2026

TDQS

A4.4/5.0

Behavior4/5

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

No annotations are provided, so the description carries the full behavioral burden, and it does disclose important traits: latency up to ~90s on a cold cache and 24h server-side caching of SSL Labs results. It does not mention authentication requirements, rate limits, or failure behavior (e.g. what happens on unreachable hosts), which is the remaining gap for an unannotated tool.

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?

Three tightly written sentences: capability and coverage first, sibling disambiguation second, latency/caching caveat last. Every sentence earns its place with no filler.

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

Completeness4/5

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

With no output schema, the description usefully enumerates what the assessment returns (grade, protocol support, ciphers, chain issues, vulnerabilities) and covers the main behavioral caveat (runtime, caching). It stops short of auth/rate-limit or error-mode details, but for a single-parameter read-style check it is nearly 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% and there is a single required parameter whose format ('no scheme/path') is already documented in the schema. The description adds no additional parameter-level meaning, so the baseline 3 applies.

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

Purpose5/5

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

States a specific verb+resource ('Full SSL Labs-style TLS assessment') and enumerates the concrete outputs: overall letter grade, protocol support TLS 1.0-1.3, cipher strength, certificate chain issues, and named vulnerabilities. It also explicitly distinguishes itself from the sibling ssl_cert_check, so an agent can route without opening either schema.

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

Usage Guidelines5/5

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

Gives explicit when-to-use ('Use this for a deep grade') and when-not plus the named alternative ('use ssl_cert_check instead for a fast expiry/issuer check'). The tradeoff condition (depth vs. speed) is stated outright, leaving nothing to inference.

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

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