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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description adds value by specifying the exact contents of the returned state (MCPs, connection status, accounts, catalog counts). It clearly indicates a read-only inspection tool, and the description aligns with the annotations without contradictions.

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, information-dense sentence. It lists four specific components of the state without any filler. This is appropriately concise and front-loaded, stating the purpose immediately and then elaborating.

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 correspondently handled, no output schema (but the description enumerates the return fields), and rich annotations, the description fully covers the tool's function. There is no missing context that an agent would need to safely and effectively call this tool.

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?

There are no parameters (schema has zero properties). The description does not need to explain any parameters in the description because there are none. According to the rubric, 0 params = baseline 4; here the description is complete and speaks to the return value instead, adding meaning beyond the schema (which is empty). So a 5 is justified.

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 unambiguously states the tool's action ('Returns the current toolkit state') and enumerates exactly what that state includes: installed MCPs, connection status, accounts, and catalog tool counts. There is no ambiguity about what this tool does.

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?

While the description doesn't explicitly mention when to use this tool relative to siblings, the nature of a read-only status tool is self-evident. The sibling list contains other info tools like show_version, but the description sufficiently conveys its purpose without needing explicit guidance. Minor gap: no mention of related tools or prerequisites, but with zero parameters, the tool is simple to call.

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