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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, covering the safety profile. The description adds behavioral detail about what information is returned (installed MCPs, status, accounts, tool counts), which complements the annotations. No contradiction exists, and the description enriches the agent's understanding of the tool's output without contradicting structured data.

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 core purpose ('Returns the current toolkit state') and then lists the key details. There is no fluff or repetition, and every part of the sentence adds value. This is exemplary conciseness and structure.

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's simplicity (no parameters, no output schema, no complex behavior), the description fully covers what it does and what it returns. It lists the specific components of the state it reports, making it complete for an agent to decide when to call it. No additional 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?

The tool has zero parameters, and the schema coverage is 100% (trivially, since there are no properties). Per the rubric, a baseline of 4 applies for 0-parameter tools. The description does not need to explain parameters, and it doesn't add any confusing parameter information. It remains clear and avoids redundancy.

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: 'Returns the current toolkit state' and enumerates the specific aspects covered (installed MCPs, connection status, accounts, catalog tool counts). This is a specific verb+resource and distinguishes it from sibling tools like 'connect' or 'authenticate' which perform actions, whereas this tool is purely informational.

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 context (for inspecting toolkit status) but does not explicitly state when to use it versus alternatives or provide exclusions. It gives clear context by saying it returns the current state, making it obvious it's for assessment, but it lacks explicit 'when to use' or 'when not to use' guidance that would earn a 5.

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