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 fully covered by structured data. The description adds no behavioral context beyond that — no mention of what happens when the key is unknown, permission requirements, or freshness of the data. With annotations carrying the burden, a 3 is appropriate.

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 front-loaded sentence with no filler; the lookup key and the returned fields are stated immediately. Every clause earns its place.

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?

Should be no output-size issue: the tool has an output schema, so return values need not be explained, and the one parameter is fully documented. For a simple read-by-key tool the definition is nearly complete, with only error/not-found behavior unaddressed.

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 the single taskKey parameter is fully documented in the schema with the identical 'ACME-42' example repeated in the description. Nothing new is added beyond what the schema already provides, so the 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?

States a specific verb (get) and resource (a single task) with the lookup key, and the word 'single' implicitly separates it from the sibling list_tasks. It enumerates what is returned (description, status name, assignee, tags), so the agent knows exactly what it yields. It stops short of naming an alternative sibling explicitly, which is the only gap.

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 'by its key': the agent infers this is for when a known task key is in hand, versus list_tasks for discovery. However, there is no explicit when-to-use, when-not-to-use, or named alternative among the many task siblings. Adequate but with a clear gap.

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