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

There are no annotations, so the description carries the full behavioral burden. It does convey a read-only mapping behavior and the output category ('product objects'), but it doesn't disclose behavior for unknown or invalid engagement ids, batch semantics, or result shape.

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?

One tightly written sentence front-loads the catalog version and purpose, includes an example, and contains no filler.

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?

For a single-parameter lookup with no output schema, this is minimally adequate: it names input and output categories. However, it doesn't explain what a 'UCP product object' contains, how missing ids are handled, or which sibling tools should be used instead, so it is not fully complete.

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 input schema already describes ids as 'Engagement ids' (100% coverage), so the schema does most of the work. The description reinforces that these are engagement ids and gives a concrete example ('readiness-sprint'), but adds no deeper semantics such as accepted id formats.

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 names a specific verb ('lookup'), a concrete resource ('UCP catalog'), and the transformation ('resolve engagement ids ... to UCP product objects'), with an example id. It clearly identifies what the tool does, though it doesn't explicitly contrast it with search_catalog or get_offer.

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?

It implies the tool is for resolving known engagement IDs rather than searching or listing offers, but it never states when not to use it. With siblings like search_catalog and get_offer, an explicit routing condition would materially help.

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