create_vendor

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. As a creation tool, it implicitly mutates state, but it doesn't disclose what happens on success (returned vendor object?), whether duplicates are detected, whether the currency default behavior is visible, or whether prerequisites exist (e.g., book must be active). The description mentions currency defaults to book's default, which adds some value, but overall behavioral context is thin.

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 description is reasonably structured with an Args section and clear parameter bullets. It's efficient with no wasted words, though the parameter enumeration duplicates somewhat what the schema already shows. The address sub-field listing is duplicated with the schema definition, but it's brief enough to be acceptable.

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 creation tool with an output schema present, the description doesn't need to explain return values, which helps. However, it doesn't address key create-operations concerns: duplicate name handling, required-field behavior, whether the new vendor is immediately usable, or whether deletion consequences exist. The address complexity is well-documented, but the overall tool is only partially contextualized.

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 only 25% (only name and notes have descriptions in the schema; currency and address are bare). The description adds useful meaning for name (example 'Office Depot'), currency (defaults to book's default), notes (max 4096 chars), and address (enumerates sub-fields and caps). This compensates for the low schema coverage partially, but no mention of required-name constraint or currency format validation beyond an example.

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?

Description states 'Create a new vendor' with a clear verb+resource pairing. It distinguishes itself from siblings like update_vendor, delete_vendor, list_vendors, and get_vendor by the create verb. The tool clearly represents a creation operation distinct from the many related vendor/customer/employee tools.

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?

The purpose is clear as a create operation, but there is no explicit guidance on when to use this vs alternatives or when not to use it. No mention of required fields, unique constraints, or scenarios where one might prefer update_vendor. Usage context is implied by the verb but no exclusions or prerequisites are stated.

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