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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds one genuine behavioral trait beyond that — results are ordered newest first and scoped to the caller's account — but says nothing about pagination or how to page beyond the limit cap.

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 fragment with zero wasted words, and the scoping constraint is front-loaded. It borders on under-specification rather than being genuinely concise, which keeps it from a 5.

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?

An output schema exists, so return values need not be explained, and annotations carry the safety profile. For a single-parameter read-only list tool the description is nearly sufficient, with only pagination behavior left implicit.

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%, with the single 'limit' parameter fully documented including its 1-50 range, so the schema does the heavy lifting. The description adds no additional meaning about the parameter, which is the expected baseline of 3.

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 identifies the resource (plans) and the exact scope (this account created), plus the sort order, so an agent knows this returns the caller's own plans rather than a global list. It never names the verb 'list' explicitly and does nothing to distinguish itself from the sibling get_plan, so it falls short of full sibling 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?

There is no statement of when to use this tool versus get_plan, list_courses, or search_knowledge, and no prerequisites or exclusions. The agent must infer from the name alone that this is the enumerate-everything variant.

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