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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered by structured data. The description adds that rows span pitchers/batters/teams/league totals and lists the filter surface, but says nothing about pagination behavior, defaults in effect, or what happens when team/with_team_only interact. Adequate but not 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?

Front-loaded with the resource and scope, then a single filter enumeration. No filler sentences, though the run-on filter list is dense and could be trimmed since the schema already covers those names.

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 13 fully documented params and an output schema present, the description only needs to establish purpose and routing, which it does. The main gap is that it never clarifies its boundary versus mlb_statcast_pitch_tempo_player, which an agent choosing among siblings would want.

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%, so all 13 parameters are already documented with defaults and allowed values (e.g. n thresholds, type Pit/Bat, limit 1-500). The description only restates the filter categories at a high level, adding no syntax or semantic detail beyond the schema. Baseline 3 is correct.

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 (Fetch) and resource (Baseball Savant Pitch Tempo rows) and enumerates the entity scope (pitchers, batters, teams, league totals). It does not explicitly distinguish itself from the close sibling mlb_statcast_pitch_tempo_player or mlb_statcast_pitch_timer, so it falls short of a 5.

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?

Gives a concrete routing rule: 'use mlb_discovery for exact values,' which tells the agent when to reach for another tool before calling this one. It offers no exclusion logic against the pitch-tempo sibling tools or guidance on which entity type to pick, so usage is clear but incomplete.

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