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

Annotations declare readOnlyHint=true, destructiveHint=false, and idempotentHint=true, which already inform the agent that this is a safe, repeatable read operation. The description adds value by specifying exactly what the returned state includes (installed MCPs, connection status, accounts, catalog tool count). This exceeds the minimum transparency and effectively communicates the output shape.

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, complete sentence that front-loads the key information ('Returns the current toolkit state') and then lists the details in a clean, readable manner. There is no fluff or repetition, making it exemplary in 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?

With zero parameters, no output schema, and a straightforward read-only purpose, this description covers everything needed: what the tool returns and the components of that return. There are no missing prerequisites or side-effects to state, as the annotations already communicate the safe, non-destructive nature. The description entirely fulfills its role.

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 schema provides 100% coverage by having no properties. The description appropriately focuses on the return value rather than parameters. Per the guideline, zero parameters receive a baseline of 4, and the description does not need to add parameter information.

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 explicitly states the function: 'Returns the current toolkit state' and then enumerates the specific information returned (installed MCPs, connection status, accounts, catalog tools count). This leaves no ambiguity about what the tool does, and it is distinct from sibling tools like 'authenticate' or 'connect'.

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 is self-contained for a zero-parameter read-only tool)Skip the generic usage note. It clearly indicates the tool's purpose without requiring additional guidance. While it doesn't explicitly say 'use this to check status before connecting,' the intuitive semantics make the call natural. A higher score would require an explicit alternative or prerequisite mention, but none are needed here.

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