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

With no annotations, the description carries the full load and does well: it discloses the state change ('Becomes the project's current BOM') and the side effect of creating a project when project_id is absent, plus the JLCPCB fee implications of assembly=true. It does not cover failure modes, latency for large BOMs, or whether re-checking overwrites a previous BOM.

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?

It is front-loaded with the core action and every sentence carries distinct information, but the whole thing is a dense run-on with the side-effect and return-value details buried mid-paragraph. Some clauses (the parenthetical about a distributor-named pack) read as internal notes rather than agent-facing guidance.

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 an 8-parameter mutation tool with an output schema, the description covers what it computes, what it changes, how it links to projects, and what the caller needs back (quote_id, dashboard_url). Nothing an agent needs to call it correctly is missing.

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 coverage is 100%, so the baseline is 3, but the description adds real meaning beyond the schema: boards interacts with price breaks and MOQ, assembly gates extended-part fees and no-fee alternatives, and a 'Pack size' column changes ordering to whole packs. That is genuine semantic value, though the pack-size behavior is not tied explicitly to a named parameter.

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 opens with a specific verb chain (match, price, flag) on a specific resource (BOM lines), and enumerates the exact problem classes it detects. It is clearly distinguishable from find_parts, find_alternatives and place_order, which it references by name.

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 strongly implied by the workflow hooks: it returns a quote_id 'for place_order' and becomes the project's current BOM, so an agent knows it sits between create_project and place_order. It never states explicit exclusions (e.g. when to use find_parts instead for a single lookup), which keeps it off a 5.

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