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

The annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, covering the safety profile. The description adds context about the output composition (installed MCPs, status, accounts, tool counts) but does not provide extras like auth needs, rate limits, or error conditions. This is adequate given the bar is lower with annotations present.

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, front-loaded sentence that efficiently enumerates exactly what the tool returns, with no filler or redundant wording. Every clause provides value, and the structure is clean.

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?

For a simple zero-parameter tool with no output schema, the description covers all relevant aspects: it states the purpose and the four types of information returned. It does not specify exact output format or potential edge cases (e.g., empty list of MCPs), but given the simplicity and annotations, it is sufficiently complete.

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 there is nothing to describe. Schema description coverage is 100% trivially. Since no parameters exist, the baseline score of 4 applies; the description appropriately focuses on the output rather than parametric details.

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 uses a specific verb ('Returns') and clearly identifies the resource ('current toolkit state') with four concrete components: installed MCPs, connection status, connected accounts, and number of catalog tools. This fully distinguishes the tool from siblings like 'connect' or 'authenticate' which are action-oriented, and 'show_version' which targets only a 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 implicitly indicates when to use the tool (to inspect toolkit state) but does not explicitly contrast with alternatives. While sibling 'show_version' might also be a read-only info tool, there is no explicit guidance on choosing between them or when not to use this tool. The context is clear but lacks stated exclusions or alternative mentions.

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