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

The annotations already declare readOnlyHint=true, destructiveHint=false, and idempotentHint=true, so the description doesn't need to re-state safety. It adds useful context beyond annotations by detailing exactly what information is returned (installed MCPs, connection status, accounts, catalog tool counts), thereby enhancing behavioral transparency for a read operation. No contradictions.

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 a single, concise sentence that front-loads the purpose and lists the key data points. Every word contributes to clarity, with no filler or redundancy.

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, no output schema, and strong annotations that indicate a safe read operation, the description is complete. It clearly enumerates the return contents, which is all that's needed for the agent to select and use the tool accurately.

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 0 parameters, and schema coverage is 100% (vacuously). Since there are no parameters to describe, the description's job is not to add parameter semantics but to clarify what the tool returns, which it does. As a result, the baseline for 'no params' is 4, and the description meets that.

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 function: it returns the current toolkit state, listing installed MCPs, connection status, accounts, and catalog tool counts. It uses specific nouns (toolkit state, installed MCPs) and a clear verb ('retrieves' implied by 'Returns'), but it doesn't explicitly differentiate from sister tools like 'show_version'.

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 provides context on when to use it ('current toolkit state') but doesn't mention alternatives or when not to use it. It doesn't explicitly contrast with siblings like 'show_version' or 'authenticate', so it leaves the choice ambiguous to some extent.

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