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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description adds a genuinely useful constraint not present in structured fields: the tool is Premium-gated, and it advertises a self-documenting "help" action.

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?

Two short sentences, front-loaded with the resource and scope, with the action list and help hint following immediately. No wasted words.

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 no output schema, the description usefully names the return domains (setups, sessions, scores, question bank), and the help action compensates for the opaque params object. Action-specific behavior and result shapes are still left to runtime discovery, so it falls short of fully self-contained.

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 67%, so the schema already documents action, params and session_id. The description only lists action names and defers all field-level meaning to the "help" action, adding little semantics beyond the enum the schema already provides.

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 resource (practice interviews) with the data domains it exposes (setups, sessions, scores, question bank) and enumerates its three read actions. It is distinguishable from manage_interview_practice by the read-only action set, though it never explicitly contrasts itself with that sibling.

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?

Names the available actions and points to action "help" for field details, which is a discovery path rather than guidance. There is no explicit statement of when to use this read tool versus manage_interview_practice, so usage is only implied by the read-only verb set.

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