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

The annotations already declare readOnlyHint=true, openWorldHint=true, idempotentHint=true, and destructiveHint=false, so safety is well covered. The description adds useful behavioral context: pagination at 20 per page, summary-only response, and filtering capabilities. This goes beyond the structural hints.

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 first paragraph and the 'When to use' section are verbatim duplicates of the same sentence. The 'Parameters to validate' section also needlessly repeats schema content. The redundancy makes it less concise than it should be.

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 read-only list tool with no output schema, the description covers purpose, usage context, all parameters, and response shape (summary info, paginated). It is complete enough for an agent to invoke correctly, though it could be improved by describing the exact summary fields.

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 coverage is 100% and the description's 'Parameters to validate' section merely repeats the schema definitions. The priority mapping (1=Low, 2=Medium, 3=High) and platform options are already in the schema, so the description adds no extra semantic value.

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 opens with a specific verb+resource+scope: 'Get closed/resolved support tickets with pagination (20 per page) and search.' It clearly distinguishes itself from siblings like get_ticket by stating it 'Returns summary info only — use get_ticket with the case number to get full ticket details.' This makes the tool's purpose unmistakable.

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 'When to use' section provides clear context: it's for closed/resolved tickets, with an explicit alternative ('use get_ticket with the case number to get full ticket details'). It doesn't explicitly mention fetch_open_tickets, but the sibling name makes it obvious.

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