get_today_completed_tasks

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 implies a read-only query but never states the timezone/day boundary that defines 'today', the ordering of results, whether recurring or completed subtasks are included, or what happens past the 20-item default cap — all material for a time-scoped completion query.

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?

Very short and front-loaded, which is good, but the second clause 'view today's accomplishments' merely rephrases the first and earns no place. That space would have been better spent on the day-boundary or ordering behavior.

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?

A simple one-optional-param read tool with no output schema, so the bar is modest. Still, the definition of 'today' (timezone/rollover) and result ordering are gaps an agent would want before relying on the output.

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% for the single 'limit' parameter (default 20, max 100), so the schema does the work and the description adds nothing about it. Baseline 3 is appropriate; the description neither compensates nor detracts.

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 a well-scoped resource: tasks completed today. The 'today' qualifier distinguishes it from the generic filter_tasks/search_tasks siblings, though the description never names those alternatives to make the distinction explicit. An agent can still grasp the purpose without opening the schema.

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?

No guidance on when to use this rather than filter_tasks, search_tasks, or get_completion_stats, which are the obvious overlapping siblings. The second clause 'view today's accomplishments' is a restatement, not usage direction, and no prerequisites or exclusions are given.

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