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

Annotations already declare readOnlyHint=true, openWorldHint=false, and destructiveHint=false, so the safety profile is covered. The description does add genuine behavioral context beyond that: it states the board refreshes daily at 22:30 UTC and mirrors a specific public page, which tells the agent how stale the data may be. It does not describe return format or size, so it stays at a 3.

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 dense sentence with the resource name front-loaded, followed by a short freshness note. Nothing is redundant, though the unglossed jargon ("ORCL torque", "MAGS trendline read") makes it denser than it needs to be for an unfamiliar reader.

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 and no parameters, the description carries the burden of saying what comes back, and it does so by enumerating the board's components. The only real gap is that it never explains the field semantics behind the branded terms.

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?

The tool takes zero parameters and the schema is empty, so there is nothing for the description to disambiguate. Baseline 4 applies; the description correctly implies the board is fetched whole with no filtering arguments.

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 names a concrete resource (a daily hyperscaler-cohort board) and enumerates its contents: Mag names with 1d/1w/1m/1y changes, the benchmark set (QQQ, SPY, SOXX, XLK, IGV, MAGS), the MAGS trendline read, and the ORCL torque. That is far more specific than a tautology and lets an agent distinguish it from get_tech_board or get_tape. It loses a point only because the branded terms are not glossed.

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?

There is no statement of when to call this versus the many sibling boards, nor any exclusions or prerequisites. The only usable cue is the daily 22:30 UTC cadence, which tells the agent about freshness but not selection criteria.

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