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

readOnlyHint=true already declares the safety profile, so the description's main added value is the "for the authenticated user" scoping, which is useful context. It says nothing about what a 'task list' contains, ordering, truncation, or what happens when the user has no lists — gaps that matter little for a read-only call but are still unaddressed.

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?

One short sentence, front-loaded with the verb and resource, with no filler or redundant restatement of the title. Nothing could be removed without losing meaning.

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 trivial zero-required-parameter read tool with a fully documented schema and a readOnlyHint annotation, this covers what an agent needs to select and invoke it. The only shortfall is that no output schema exists and the description doesn't hint at the return shape.

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 single 'account' parameter is fully documented in the schema, so the baseline is 3. The description's phrase "the authenticated user" slightly undersells the fact that an alternate account can be selected, adding no meaning beyond the schema.

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 resource ("List all task lists") and scopes it to "the authenticated user." The wording distinguishes it from the sibling gws-mcp__tasks_list_tasks by naming 'task lists' rather than 'tasks', though it never explicitly points at that sibling to confirm the distinction.

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 only implied: an agent can infer this is the discovery step before tasks_list_tasks or tasks_create_tasklist, but the description never says when to use it or names alternatives. There are no exclusions or prerequisites stated.

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