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

With annotations declaring readOnlyHint=true and destructiveHint=false, the safety profile is already established. The description adds what is actually returned (MCPs, statuses, accounts, counts), but could have added a note about potential staleness or that it doesn't require auth.

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, directly front-loaded with the main verb, no wasted words. Lists just enough detail to be informative.

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?

For a zero-parameter informational tool with good annotations, this is complete. Output schema is absent, so the description's list of returned information suffices. No other context is needed.

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?

There are zero parameters, and the schema coverage is 100% (vacuously). The description explains what the tool reports, which fully compensates for the lack of parameters.

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') and clearly specifies the resource ('current toolkit state') and details what that includes (installed MCPs, connection status, accounts, catalog tool counts). This distinguishes it from siblings like authenticate/connect/marketplace.

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?

It doesn't explicitly mention when not to use this tool or name an alternative, but the context of 'current toolkit state' strongly implies its primary diagnostic use case. The clear subject matter and scope make the usage context obvious.

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