pipedrive_mail_threads_update

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. It says 'update' and lists fields, but does not disclose whether linking to a deal/lead replaces or adds to existing links, whether archiving or sharing is reversible, what permissions are required, or what side effects the call has.

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?

A single tight sentence with the verb and resource front-loaded, followed by the affected fields. No filler, though it is arguably terse to the point of omitting useful context rather than being optimally structured.

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 six-parameter mutation tool with no annotations and no output schema, the description covers the mutation surface but omits permissions, reversibility, and combined-call behavior. The 100% schema coverage compensates for the parameter side, making this minimally adequate rather than complete.

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% and every one of the six parameters has an inline description, so the schema does the heavy lifting and the baseline is 3. The description's field list roughly mirrors the schema (deal/lead link, read/unread, archive, share) without adding syntax, constraints, or interaction rules beyond it.

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 (Update) and resource (mail thread) and enumerates the four distinct mutation surfaces: deal/lead linking, read state, archive state, sharing. An agent can immediately tell this apart from the sibling read tools (mail_threads_get, mail_threads_list, mail_messages_get). It does not explicitly name the siblings it is not, so it stops short of a 5.

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?

There is no guidance on when to use this versus pipedrive_mail_threads_get or pipedrive_mail_threads_delete, no prerequisites, and no indication of whether all four operations can be combined in one call. The agent is left to infer usage entirely from the name.

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