pipedrive_mail_thread_messages_list

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

No annotations are provided, so the description carries the full behavioral burden. 'List' implies a read operation, but the description omits pagination behavior, return cardinality/ordering, and permission requirements. Only the include_body toggle is touched on, leaving most behavioral traits undisclosed.

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?

Two short sentences, front-loaded with the core action and no filler. It is appropriately sized for a simple two-parameter list tool, though the second sentence is more parameter hint than distinct value.

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 low-complexity list tool this is minimally adequate, but with no annotations and no output schema the description could usefully state read-only nature and pagination expectations. It covers the essentials but leaves real gaps for an agent.

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 100%, so both parameters are already documented in the schema. The description reinforces include_body's role but adds no format or syntax detail beyond it. Baseline 3 is appropriate when the schema does the heavy lifting.

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?

States a specific verb and resource: 'List messages within a mail thread.' An agent can understand the operation clearly. However, it does not differentiate itself from siblings like pipedrive_mail_threads_get or pipedrive_mail_messages_get, leaving the scope boundary implicit.

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 offers no when-to-use context, no prerequisites (e.g., needing a thread ID from mail_threads_list), and no alternatives. The second sentence addresses a parameter rather than usage routing, so there is essentially no guidance.

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