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

The annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is fully disclosed structurally. The description adds valuable context about what the return state contains (MCPs, connection status, accounts, catalog counts). However, it does not mention whether it makes network calls, its latency characteristics, or any caching behavior, keeping this at a solid 3.

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?

Exactly one sentence, front-loaded with the primary purpose ('Returns the current toolkit state') followed by a compact enumeration of the four data categories returned. Every word earns its place with zero fluff 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 zero-parameter, read-only status tool, the description covers what return data to expect. There's no output schema, so the description's inventory of return contents (MCPs, statuses, accounts, catalog counts) provides meaningful guidance. Slightly incomplete in that it doesn't hint at the response structure/format, but that's minor for a tool this simple.

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 0 parameters with 100% schema description coverage (vacuously satisfied), so the baseline of 4 applies. The description correctly focuses on return semantics rather than parameters. Nothing more is needed.

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-resource pair ('Returns the current toolkit state') and enumerates exact contents: installed MCPs, connection status, accounts, and catalog tool counts. This clearly differentiates it from siblings like 'connect' and 'authenticate' which are action-oriented, whereas this is a status getter.

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?

Usage is implied rather than explicit. The informational nature of the tool ('Returns the current toolkit state') suggests using it for status/diagnostics, but the description never explicitly states when to prefer it over alternatives or when not to use it. A clear 'the' would be improved with a sentence like 'Use this before connecting to verify state.'

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