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

Annotations already cover read-only, open-world, idempotent, and non-destructive behavior. The description adds useful context beyond annotations, including the paid nature, the specific x402 price, and determinism, but it does not disclose other behaviors such as auth requirements, rate limits, or whether anything is returned in a particular format.

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 short and front-loaded with the core purpose, followed by pricing. It is effective and mostly free of filler, but 'Paid' appears redundantly in both the first and second sentences, and the second sentence could have simply stated the price.

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?

There is no output schema, so the description should explain what the analysis returns or how the exposure result is expressed, but it does not. It also fails to define the shape of the dependency facts input. The pricing context is helpful, but the missing input and output semantics leave the agent unable to confidently invoke or interpret the tool.

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. It maps the dependencies parameter to 'caller-supplied dependency facts,' which adds some meaning, but it never defines what a dependency fact is, what fields each item must contain, or how the array should be structured. This is not enough for an agent to construct a valid call.

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 clearly identifies the resource: a deterministic analysis of vendor lock-in exposure covering concentration, portability, alternatives, and switching costs. It is specific about what it measures and what input it consumes, and it avoids tautology. However, it does not explicitly distinguish itself from closely related siblings like cross_protocol_compatibility_matrix.

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 use case: when a caller has dependency facts and needs vendor lock-in exposure analysis. It does not provide explicit when-to-use versus when-not-to-use guidance or name alternatives, so the agent must infer the appropriate context from the purpose statement.

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