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

No annotations are provided, so the description carries the full behavioral burden. It says only that the tool annotates an IR spectrum with a known structure and does not disclose side effects, authentication needs (api_key), processing behavior, or what 'annotate' actually entails operationally.

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 front-loaded sentence with no filler. It is efficient, though arguably too terse for the tool's complexity.

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?

The existence of an output schema means return values need not be described, but the description remains inadequate for a three-parameter tool with no annotations and 0% schema description coverage. It omits essential operational details such as what path represents, whether api_key is required, and how annotation is performed.

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 0%, so the description must compensate for all three parameters. It mentions SMILES as the molecular structure but does not explain the required 'path' parameter (spectrum file?) or the optional 'api_key', nor does it state accepted SMILES or path formats.

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 states a specific verb ('Annotate'), resource ('IR spectrum'), and the required structural input ('known molecular structure (SMILES)'). It is clear what the tool does at a high level, but it does not distinguish itself from IR siblings such as covair_identify, covair_verify, or covair_auto_analyze.

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 choose this tool over alternatives like covair_identify or covair_predict_ir. No prerequisites or exclusions are mentioned, leaving the agent to infer usage entirely.

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