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

Annotations already declare readOnlyHint=true and destructiveHint=false; the description adds that the call is free, requires no account, and returns the snapshot and when it was taken. The feedback-channel detail is peripheral but does not contradict the annotations.

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?

Core behavior and rationale are front-loaded and efficient. However, the two-sentence feedback solicitation about 'POST /feedback' is extraneous to tool selection and invocation, preventing a higher score.

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, the description plus schema and annotations cover auth (no account), cost (free), error behavior (404 on unknown venue), and returned content (snapshot and timestamp). An output schema is absent, but the essential return semantics are described.

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%, so the single 'venue' parameter is already fully documented, including the free-404 edge case. The description itself adds no parameter-level detail beyond that, so it meets the baseline for full schema coverage.

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 identifies the resource as 'the baseline snapshot we hold for one venue' and its role ('what a paid check would diff against, and when it was taken'). It is clear and distinct from drift_check and drift_venues, though it lacks a direct action verb like 'get' or 'retrieve'.

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?

It states the intended moment of use: read the free baseline before making a paid check so the first call is not blind. It does not explicitly name sibling alternatives or give when-not-to-use conditions, but the context is clear.

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