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

Annotations comprehensively cover the safety profile (readOnlyHint: true, idempotentHint: true, destructiveHint: false), and the description adds value by detailing what the returned state contains. No contradiction — the description's read-verb matches the read-only annotation. It doesn't disclose additional behaviors like auth requirements or rate limits, but for a stateless inspection tool the bar is mostly met by the annotation coverage.

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

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

Single sentence, front-loaded with the verb and resource, and uses a colon-led enumeration to pack the full return description into one compact line. Every word earns its place; zero filler.

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

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

With no output schema present, the description compensates by enumerating the return content (installed MCPs, connection statuses, accounts, catalog counts). Annotations cover the safety profile. It could mention when to invoke (e.g., pre-connection check), but for a no-parameter state-inspection tool the coverage is strong.

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

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

The tool has zero parameters secret: special, schema coverage is trivially 100% (empty properties). Per rubric, 0 params = baseline 4. There is no parameter meaning for the description to add beyond what the schema already implies.

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

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

The description uses a specific verb ('Returns') with a clear resource ('toolkit state') and enumerates exactly what it returns: installed MCPs, connection status, accounts, and catalog tool counts. This clearly distinguishes it from sibling tools like authenticate and connect, which are about establishing connections rather than inspecting state.

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

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

The description makes the purpose evident (inspecting current toolkit state) but offers no explicit when-to-use or when-not-to-use guidance. The context is reasonably clear — an agent would call this to check what's installed/connected — but it doesn't name alternatives or exclusions, relying on the reader to infer the division of labor among siblings.

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