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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety and open-world nature are covered. The description adds the return shape (athlete ids and teams), which is useful given no output schema, but says nothing about result limits, pagination, or partial-match behavior of the name search.

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 sentence that names the action, scope, and output with zero filler. Every clause earns its place.

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 tells the agent what comes back (athlete ids and teams). The remaining gap is behavioral: no mention of the "limit" default, result caps, or how ambiguous names are handled, which an agent would need to call this confidently.

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 75%: query, sport, and league are documented in the schema (league including the full monitored-league list), while limit has no description anywhere. The description only reinforces "by name within a league," adding little beyond what the schema already provides, so the baseline 3 applies.

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 (find players), the scope constraint (within a league), and even the return payload (athlete ids and teams). It clearly differs from the get_* siblings, but it never names the closest alternative like get_team_roster, so it falls 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?

"Find players by name" implies the use case (name-based lookup when the athlete id is unknown), but there is no explicit when-to-use/when-not guidance and no pointer to alternatives such as get_team_roster or list_teams for enumerating players.

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