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 well covered. The description adds value by specifying what the state includes (installed MCPs, connection status, accounts, catalog tool counts), which goes beyond the annotations. However, it does not disclose details like whether the state is cached, whether it triggers any network calls, or the format of the response. With annotations covering the safety aspects, a 3 is appropriate.

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, well-structured sentence that front-loads the purpose ('Returns the current toolkit state') and then enumerates the specific components. Every phrase adds value, with no redundancy or filler. It is appropriately sized for a zero-parameter tool.

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 the tool has no parameters, no output schema, and simple annotations, the description is quite complete. It explains what the tool returns in enough detail for an agent to know what to expect. The only minor gap is that it doesn't mention whether the state is real-time or cached, but for a status tool, this is not critical. The description covers the essential context.

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 the schema description coverage is 100% (vacuously, since there are no properties). The description adds meaning by explaining what the tool returns, which is the only relevant semantic content. Since there are no parameters to document, the baseline of 4 applies, and the description fulfills the need by clarifying the output.

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 returns the current toolkit state, listing specific elements: installed MCPs, connection status, connected accounts, and catalog tool counts. This is a specific verb+resource with a clear scope, and it distinguishes itself from siblings like authenticate or connect by focusing on state inspection rather than actions.

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 usage as a diagnostic/status check, but it does not explicitly state when to use it versus alternatives. Given the sibling tools are action-oriented (authenticate, connect, marketplace), the context is clear enough, but there is no explicit 'use this when' guidance or exclusions.

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