invoices_print

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

Minimal behavioral context beyond the action. Does not describe return format (e.g., file URL or binary), side effects (e.g., logging), or required permissions. No annotations to compensate.

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 concise sentence with no filler. Front-loaded with the key action and resource. Could be slightly improved by mentioning output, but efficient overall.

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?

Covers the basic purpose but missing output format (e.g., returns PDF file) and preconditions (invoice must exist). Incomplete for a tool with no annotations or output schema.

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 for 'id' is 'Invoice ID', which is clear. Description adds no additional detail. With 100% schema coverage, baseline 3 is appropriate.

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 'Generate a printable PDF for an invoice' clearly states the tool's action (generate PDF) and resource (invoice). It distinguishes from siblings like invoices_get (returns JSON) and invoices_email (sends email).

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 guidance on when to use this tool versus alternatives. Does not mention that it should be used only after an invoice exists, nor contrasts with other invoice actions (e.g., create, update).

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