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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is clear. The description adds the scope of information returned (installed MCPs, status, accounts, tool counts) but does not disclose any additional behavioral details like potential latency or partial failures, which is acceptable given the simple read operation.

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?

The description is one concise sentence that is front-loaded with the main action ('Returns the current toolkit state') and then enumerates the specific information included. There is no waste or repetition.

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?

Given that the tool has no parameters and no output schema, the description is nearly complete for a simple read-only state tool. It explains what the output contains (installed MCPs, status, accounts, tool counts), which is sufficient for the agent to understand its use. It could benefit from mentioning the output format or structure, but that is a minor gap.

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, so the description does not need to add parameter semantics. The schema coverage is 100% (vacuously), so a baseline of 4 is appropriate; the description clearly communicates what the tool does, which is enough for a no-parameter tool.

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 clearly states the tool's purpose: it returns the current toolkit state, listing installed MCPs, connection status, connected accounts, and catalog tool counts. It uses specific verbs and resource references, and it is well-differentiated from siblings like connect and authenticate, which are action-oriented.

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 implies that this tool should be used to check the state of the toolkit, which is a distinct read-only operation versus siblings that perform actions. However, it does not explicitly state when not to use it or mention alternatives, so it slightly falls short of a 5.

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