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

Annotations already declare readOnly, idempotent, non-destructive, closed-world behavior. The description adds real value beyond that: the shape of results (canonical play-page links plus related primary guides), the empty-query fallback to alphabetical listing, and an explicit warning that ordering is not popularity-driven.

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?

Three short sentences, front-loaded with the core action before the return value and the empty-query caveat. Every sentence carries information; minor room to fold the popularity caveat more tightly.

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 explains what comes back (play-page links, primary guides) and covers the zero-required-parameter edge case. The only gap is the semantics of tags/limit/device, which are left entirely to the partially documented schema.

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 60%, so the schema already documents query and category. The description adds the empty-query behavior for the query parameter but says nothing about tags, limit, or device, leaving part of the parameter set undocumented in both places. Baseline 3 is appropriate.

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 (search full-release browser games) and names the searchable fields (title or gameplay). It distinguishes itself from get_game by emphasizing discovery rather than retrieval, though it never explicitly contrasts with recommend_games or search_guides.

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?

Provides clear usage context: an empty query lists games alphabetically and results do not reflect popularity, which preempts a common misreading. However, it never names alternatives (recommend_games, get_game) or states when this tool should be preferred over them.

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