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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description adds the returned field set, which is useful context, but says nothing about pagination, ordering, or whether tasks are returned flat or as a dependency tree.

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 fragment with zero filler; the returned-field list is the highest-value information and comes immediately. Only the missing verb keeps it from being exemplary.

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?

With only one required parameter and no output schema, enumerating the returned fields is exactly the compensation needed. The remaining gap is structural: it doesn't say whether results are paginated or hierarchical, which matters for Gantt data with dependencies.

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 schema itself documents project_id as coming from list_projects, so the description need not repeat it. It adds no extra syntax or constraints beyond what the schema already states, making the baseline 3 correct.

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?

Identifies the exact resource ('Gantt schedule tasks of a project') and enumerates the fields returned, so an agent knows what it gets without opening a schema. It is a noun-phrase fragment rather than a verb+resource statement, and it doesn't name the related sibling update_schedule_task, so it stops short of full differentiation.

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: the project_id requirement makes clear it is per-project retrieval. There is no explicit 'use this when' statement, no mention of when to prefer get_project or update_schedule_task, and no prerequisites.

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