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 established. The description adds contextual value by specifying exactly what data is returned (installed MCPs, connection status, accounts, catalog tool counts), which goes beyond the annotations without contradicting them.

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?

A single sentence of approximately 25 words fully communicates the tool's purpose and return data. It is front-loaded with the action ('Returns the current toolkit state') followed by a compact enumeration of the included data. 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?

For a simple read-only state tool with zero parameters and no output schema, the description adequately enumerates the return data (installed MCPs, connection status, accounts, catalog tool counts). It is complete enough for an agent to understand what it will receive, though it could optionally mention whether the state is live or cached.

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 100% schema coverage (empty schema), so there are no parameter semantics to document. Per the rubric baseline for 0-param tools, a 4 is appropriate — the description appropriately focuses on the return payload instead.

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') plus a precise resource ('current toolkit state') and enumerates the exact data included: installed MCPs, connection status, connected accounts, and catalog tool counts. This clearly distinguishes it from sibling tools like authenticate, connect, and marketplace, which are operation/connection tools rather than state inspection.

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 — checking the state of the toolkit — but does not explicitly state when to use this tool versus alternatives like connect or authenticate, nor does it mention that a pre-flight state check would be useful before operation calls. No exclusions or alternative references are provided.

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