Create a sip user

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

Annotations already declare readOnlyHint=false, idempotentHint=false and destructiveHint=false, so the safety profile is covered structurally. The description adds nothing about what the call creates, whether required fields must reference existing resources, or what permissions are needed — notable gaps for a 16-field create mutation.

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?

It is short and front-loaded, so it is not verbose in the penalized sense. However the parenthetical endpoint adds almost no decision value, and brevity here reflects under-specification rather than disciplined concision.

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 16-parameter, non-idempotent create operation with no output schema, the description should explain what a sip user is, what required vs. optional fields accomplish, and what gets returned. None of that is present, leaving the agent dependent entirely on schema field names.

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 all 16 fields (including the two required ones and the three enums) are documented structurally; baseline 3 applies. The description contributes no additional meaning about field interactions, defaults, or which optional fields are commonly needed.

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?

"Create a sip user" restates the tool name and title verbatim; the only added content is the HTTP path (POST /sip_users). It does not distinguish this from siblings like placetel_update_sip_user or placetel_create_user, so an agent learns nothing beyond what the name already said.

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 when-to-use guidance, no mention of prerequisites (e.g., needing a routing plan or webuser_id first), and no routing to alternatives such as placetel_create_user or placetel_create_provisioning. The agent must infer all selection logic from the name.

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