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

With no annotations provided, the description carries the full burden of behavioral disclosure. It does reveal the output fields and the optional tag filter, which is useful, but it never explicitly states that the tool returns a list or how the filter behaves when omitted. There is no mention of ordering, default behavior, or error cases.

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 sentence with no filler words, which is efficient. However, it reads more like a noun phrase than a functional tool description, and important behavioral information is missing. It is concise but at the cost of completeness.

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?

Given the absence of annotations and an output schema, the description should fully explain what the tool returns, how filtering works, and what each parameter means. It partially covers return fields and optional tag filtering, but it does not explain filterKey, the exact return shape, or the distinction from sibling comparison tools. This is inadequate for an agent to invoke the tool with confidence.

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 by explaining filterKey and filterValue. It only mentions filtering 'by a tag value,' which partially explains filterValue but leaves filterKey entirely unclear. The relationship between the two parameters and acceptable values is not specified.

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 a specific resource ('the options in the 409A valuation providers for US startups comparison') and lists the returned fields (name, what it is best for, tags), so it is not a pure tautology. However, it lacks an explicit verb such as 'list', 'return', or 'get', making the tool's action ambiguous. The title 'The options' reinforces the noun-phrase style without clarifying behavior.

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?

The description implies the tool is used to view options, optionally filtered by tag, but it gives no explicit guidance on when to choose this tool over its siblings like compare_criteria or compare_table. There are no exclusions, prerequisites, or decision rules. An agent would have to infer usage context from the tool name and siblings.

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