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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile and external-network nature are covered by structured data. The description adds nothing beyond that: it doesn't say whether the test is synchronous or async, how long it takes, whether it consumes quota, or what a failure looks like. There is no contradiction, but no value added either.

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 well-formed sentence with the verb and scope front-loaded; nothing is wasted. It is not padded, though it is terse to the point of omitting anything useful.

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 one-parameter read-only tool with full schema coverage, the definition is minimally adequate. Since there is no output schema, the description could have stated what a test returns (pass/fail, error detail, latency), which is the main remaining gap.

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?

Schema description coverage is 100% and the single parameter connector_id is documented as a UUID, so the description needn't repeat it. Baseline 3 applies since the description adds no additional meaning about the identifier (e.g. where to obtain it).

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 names a specific verb ('Test') and resource ('an existing connector's connectivity'), so an agent can tell it performs a connectivity check rather than a mutation. However, it does not distinguish itself from close siblings such as connector_test_config or connector_status, leaving the agent to infer the difference.

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?

There is no guidance on when to call this instead of connector_test_config, connector_status, or connector_run. The only implicit condition is 'existing', which just restates that connector_id is required.

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