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

No annotations are provided, so the description must carry behavioral disclosure. It reveals that only 'published' entities are considered and that observed facts and readiness metadata are used, but it does not state whether the tool is read-only, what side effects it might have, what output to expect, or any permission requirements.

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 dense sentence with no filler or repetition. It front-loads the core action and includes the key qualifiers (published, stated requirement, observed facts, readiness metadata) without wasting words.

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, no output schema, and no parameter descriptions, the description leaves major gaps: what refs should contain, what the comparison output looks like, and whether any state changes occur. An agent would struggle to invoke this tool correctly without additional external knowledge.

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 hints at 'requirement' as the 'stated requirement' parameter but gives no explanation of what 'refs' contains (e.g., entity IDs, names, URLs) or how the requirement string should be formatted. This leaves the only required parameter, refs, semantically undefined.

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 ('Compare'), a specific resource ('published ACEL entities'), and a clear purpose ('against a stated requirement using observed facts and readiness metadata'). This clearly distinguishes it from sibling tools like get_entity, search_entities, and search_offerings, which perform different actions.

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 usage context: comparing entities against a requirement when observed facts and readiness metadata are available. However, it does not explicitly state when to prefer this tool over alternatives like search_entities or get_entity, nor does it mention any exclusions or prerequisites.

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