compare_entities

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

No annotations are provided, so the description carries the behavioral disclosure burden. It explains the entity comparison and filter defaults, but does not state whether this is a read-only search, whether it traverses the entire knowledge base, or any auth/rate-limit behavior. The presence of an output schema covers return values, keeping this at a minimum-viable level.

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 first sentence front-loads the purpose efficiently, and the Args list documents parameters without excessive prose. Minor redundancy in restating defaults is acceptable for clarity.

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?

With 5 parameters, no annotations, and an output schema, the description covers parameter semantics but omits when-to-use guidance and behavioral boundaries. It is adequate for invocation but incomplete for confidently selecting the tool against siblings.

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 and largely does: it gives concrete examples for entity_a, entity_b, dimension, and explains phase/area as filters with defaults. It does not enumerate allowed values for phase/area beyond 'all', preventing a 5.

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 the verb and resource: 'Compare two entities side-by-side.' It lists concrete entity types (countries, modules, regulatory frameworks, knowledge base entries) so the agent knows the scope. It does not explicitly differentiate from siblings, though no sibling is a comparison tool.

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?

Usage is implied by the comparison purpose and the examples, but the description never says when to choose this tool over search_knowledge or get_country_rules, nor does it state exclusions or prerequisites. The agent must infer the appropriate context.

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