List service history (pickups)

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

Annotations already declare readOnlyHint=true and idempotentHint=true, so the read-only nature is covered. The description adds behavioral context by mentioning pagination, filtering by status, and listing the specific status values, which goes beyond the annotations. No contradiction exists.

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 concise with three short sentences that cover purpose, returned fields, and pagination/filtering. It wastes little space, though the status enum is somewhat redundant with the schema.

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?

Since there is no output schema, the description's enumeration of returned fields (date, status, collection time, weight, services rendered) is essential and well-provided. Combined with pagination, filtering, and the read-only annotation, the tool is fully contextualized for a list operation.

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%, meaning each parameter (page, status, per_page) already has a clear description. The description only redundantly mentions status filtering and provides no additional parameter detail 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?

The description states 'List past collection stops for your account' with a specific verb and resource, and explicitly says 'past' to distinguish from the sibling 'list_upcoming_services'. It also enumerates the returned fields, making the purpose unmistakable.

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 description clearly indicates this is for historical collection stops, which contextually differentiates it from the upcoming-services sibling. However, it does not explicitly name alternatives or state when not to use this tool, so it stops short of full usage guidance.

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