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

Annotations already declare readOnlyHint, idempotentHint and non-destructive behavior, so the safety profile is covered. The description adds the 2–4 college bound and the effect of course_slug, but says nothing about response shape or limits; with annotations present, this is adequate rather than rich.

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 sentences, zero filler, with the core comparison scope front-loaded before the optional course_slug refinement. Every clause carries information.

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 correctly enumerates the returned comparison dimensions and the course-level variant. It stops short of stating result format or pagination, but for a bounded comparison tool this is close to complete.

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 50%, and the description compensates by explaining what course_slug actually does (compares fees, duration and mode for that course at each college) rather than merely restating the property name. It also reinforces the 2–4 college constraint from 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+resource ('side-by-side comparison of 2–4 colleges') and enumerates the compared dimensions (type, location, approvals, NAAC, NIRF, rating, fees, placements). It is clearly distinguishable from get_college_details and search_colleges, though it does not name those siblings explicitly.

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?

It gives one conditional rule — pass course_slug to compare course-level fees, duration and mode — which is genuine usage guidance. However, it never says when to choose compare_colleges over get_college_details or search_colleges, leaving the primary routing decision implicit.

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