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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint false, covering the safety profile. The description adds some behavioral context (returns specific fields, conditional field for postseason, and mentions an 'Apply:' command), but does not go beyond that in terms of side effects, auth, or rate limits. Since annotations are present, a score of 3 is appropriate.

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?

The description is dense but organized: purpose, exclusions, requirements, scope, returns, and application note. It packs a lot of information in a compact form without excessive verbosity. The 'Apply:' line is a bit cryptic but not redundant. Overall efficient and well-structured.

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?

There is no output schema, so the description compensates by listing the returned fields (roster_size, suit_mix, anchor_stacks, season_animal) and the conditional year_animal_match_pct. It also clarifies the default scope and gametype. Given no output schema is present, this is sufficient for a caller to understand what to expect.

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 100% with a description for every parameter; the description adds little beyond the schema. It repeats that season_yr and team_code are required, and the schema already explains scope and gametype defaults. The description's mention of 'suit mix' and 'anchor stacks' refers to output concepts, not parameter meanings. Baseline of 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?

The description clearly states it retrieves MLB team × season roster cardology data including suit mix, anchor stacks, and Chinese zodiac year-animal match. It explicitly distinguishes from sibling tools by saying what it is NOT for (play-by-play numerology, dyads, single date) and points to the correct alternatives.

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 provides explicit when-to-use and when-not-to-use guidance, naming sibling tools (get_plays_numerology, get_compatibility, get_date) as alternatives. It also states required parameters (season_yr + team_code) and explains the two scope options (ws_champion default vs postseason) with gametype default.

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