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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered without description help. The description usefully adds what gets inspected, but says nothing about behavior an agent needs to reason about - notably what happens if both 'file' and 'content' are omitted, or whether findings are advisory only. No contradiction with 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?

A single front-loaded sentence with the verb and resource first, then the specifics. Every clause earns its place; the only small cost is that the enumerated list is dense and slightly runs together, but nothing is padded.

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?

An output schema exists, so return values need not be described, and the annotations cover safety. What remains missing is exactly the thing an agent must get right to invoke it: how 'file', 'content' and 'filename' combine, given zero required parameters. Adequate but with a real operational 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%, so all three parameters are documented in the schema itself, establishing the baseline of 3. The description adds no meaning about the file-vs-content relationship despite all parameters being optional, leaving the mutual-exclusivity/at-least-one rule unstated in both places.

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?

Names a specific verb ('check') and resource ('a score') and enumerates the three defect classes it looks for (exporter quirks, bars that do not fill their time signature, out-of-range notes). It does not explicitly distinguish itself from the sibling 'inspect', which an agent could reasonably read as an overlapping diagnostic tool.

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 by the enumerated checks - an agent can infer it should call this when it wants correctness problems found rather than a score transformed or rendered. There is no explicit when-to-use statement, no exclusion, and no pointer to 'inspect' or 'compare' as the alternative when the goal is descriptive rather than diagnostic.

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