list_customers

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

Annotations already provide readOnlyHint=true. The description adds behavioral context beyond annotations: it explains that q searches across specific fields and that summary=True returns a subset of fields. This adds useful detail without contradiction.

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 extremely concise with three short sentences front-loading the core action and then adding parameter specifics. Every sentence adds value with no redundancy.

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?

Given the tool's moderate complexity (4 parameters, optional paging), the description covers search and summary but omits pagination behavior entirely. With an output schema present, return format is covered, but missing paging guidance leaves the description slightly incomplete.

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 0%, so the description bears the burden. It explains the 'q' parameter (searches in razon social, direccion, CIF, telefono, email) and 'summary' (returns id, tradename, cif, email). However, 'page' and 'page_size' are left unexplained, making it partially complete.

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 clearly states the verb 'Lista' (lists) and the resource 'clientes' (customers). It distinguishes itself from siblings like 'get_customer' by specifying search capabilities across multiple fields and a summary mode, making its purpose and scope specific.

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 implies usage for listing/searching customers but lacks explicit guidance on when to use this tool versus alternatives (e.g., get_customer for a single customer). No when-not-to-use or exclusions are provided.

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