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

With no annotations provided, the description bears the full responsibility for disclosing behavioral traits. It only states that it 'returns' history, implying a read operation, but fails to mention any potential side effects, error conditions, pagination, authentication requirements, or limitations. The description adds minimal information beyond the basic action.

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, clear sentence with no redundant words. It front-loads the action and object, making it easy for an agent to quickly grasp the tool's purpose. There is no wasted information.

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 an output schema, annotations, and sibling differentiation, the description is too sparse. It does not explain what the returned history looks like (format, fields), nor does it clarify the meaning of 'published observation' or any constraints on the endpoint. An agent would likely need additional runtime errors or documentation to use this tool correctly.

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?

The schema has 0% description coverage for the single 'endpoint' parameter. The description provides some context by saying 'for one service route', which suggests the endpoint refers to a service route, but it does not clarify the expected format (e.g., URL, ID) or any constraints. This is insufficient compensation for the complete lack of schema-level documentation.

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 states a specific action ('Return') and a specific resource ('Atinamos's published observation history for one service route'). It distinguishes itself from sibling tools by focusing on history, which is distinct from policy evaluation, evidence lookup, or service search. The purpose is unambiguous and immediately understandable.

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 provides no guidance on when to use this tool versus its siblings (evaluate_policy, lookup_evidence, search_services). It does not mention scenarios, prerequisites, or exclusions. An agent is left to infer that this tool is for retrieving history without any explicit contextual cues.

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