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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered. The description adds only the default sort order ('newest first'), which is already conveyed by the direction parameter's schema description, and says nothing about result volume or pagination.

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 with the essential content front-loaded; nothing is wasted and it is easily scanned. The trailing raw endpoint path adds little for an agent but is harmless.

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 simple two-parameter read listing with full schema coverage, no output schema, and annotations covering safety, the description provides enough to call the tool correctly. The only notable gap is whether results are truncated or paginated.

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 (lead_id and direction enum) are fully documented in the schema. The description adds no syntax, format, or defaulting detail beyond what the schema already provides, so baseline 3 applies.

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?

Clear specific verb+resource: lists comments on a lead, and clarifies that 'comments' encompasses notes, logged calls/meetings/emails, which removes ambiguity about returned content types. It implicitly contrasts with nocrm_add_lead_comment but never names or routes between siblings explicitly.

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?

Usage is implied by the read-only listing framing and the required lead_id, but there is no explicit statement of when to choose this over nocrm_list_lead_history, nocrm_list_activities, or nocrm_get_lead. No exclusions or prerequisites are given.

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