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

Annotations already declare readOnlyHint and openWorldHint, so the safety profile is covered, and an output schema exists so return format need not be spelled out. The description adds only that the feed is 'public' and restates the offset range, which is already in the schema, so extra behavioral context is thin.

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 with zero padding; the sport and offset scoping come first and nothing redundant follows.

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?

For a two-parameter read tool with full schema coverage, an output schema, and safety annotations, the description covers what an agent needs to call it. It stops short of clarifying live-vs-final score content or how it relates to the calendar/match siblings.

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%: sport enumerates all supported keys and day_offset documents its -7..7 range and default. The description merely echoes the day-offset range and adds no semantics (e.g., whether offset is calendar-day or timezone-relative) beyond 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?

The description states a specific resource and scope: a public score/fixture feed keyed by sport and day offset. It is clear what the tool returns, but it never distinguishes itself from close siblings such as flashscore_calendar, flashscore_navigation, or the livescore_* family, so an agent must guess which one covers scores vs. calendar.

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?

Usage is only implied: the mention of a sport plus a date-picker offset suggests 'use this to get scores/fixtures for a given day.' There is no explicit when-to-use, no when-not-to-use, and no named alternative for adjacent needs like match detail (flashscore_match_info) or standings.

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