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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and a closed world, so the safety profile is fully covered structurally. The description adds useful shape about what is returned (units, opening figures, build-up choices, calculators, exclusions), but says nothing about sizing, pagination or how it behaves for an unknown id.

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?

A single dense sentence with the identifier and the return contents front-loaded; every clause carries information and there is no filler. It is slightly long for one sentence but nothing is wasted.

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 annotations covering safety and an output schema covering the return shape, the description only needs to frame the lookup, which it does. Missing is any linkage to the execution-side sibling run_takeoff, which would help an agent pick correctly between the two.

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 100%, so both parameters (takeoff id and the full/summary detail toggle) are already documented in the schema; baseline 3 applies. The description reinforces the id lookup but never mentions the detail parameter, so it adds no meaning beyond the schema.

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?

States a specific verb and resource ('Returns the measurements one whole-job takeoff needs, identified by its id') and enumerates what the payload contains, so the agent knows exactly what it gets. It does not, however, distinguish itself from the sibling run_takeoff or create_project_file_from_takeoffs, which is the main gap at this level.

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?

No when-to-use statement, no prerequisites, and no mention of alternatives such as run_takeoff (which presumably executes a takeoff) or create_project_file_from_takeoffs. The agent must infer from the name alone when this is the right call.

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