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

Annotations already declare readOnly, idempotent, openWorld, and non-destructive, so the safety profile is covered. The description adds the upstream REST endpoint and a docs link, which aids interpretation, but says nothing about time granularity, default range, or coverage of the returned history.

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 purpose sentence is front-loaded and the docs link plus endpoint line are compact and useful reference material. Slight overhead from formatting, but nothing extraneous.

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?

An output schema exists and annotations cover the safety profile, so the burden is lighter. Still, the existence of get_hashrate_by_period and get_pools_hashrate_by_period siblings means the description should clarify whether this returns full history at a default resolution or supports period selection.

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 0% at the property level; the only documentation is the $defs description of PoolSlug. The description compensates slightly by tying the slug to "a specific mining pool," but adds no examples, format rules, or note that invalid slugs fail.

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?

"Get hashrate history for a specific mining pool" gives a specific verb, resource, and scope (single pool), which implicitly separates it from the network-wide get_hashrate and the multi-pool get_pools_hashrate. It never names those siblings explicitly, so an agent must infer the distinction from the word "specific."

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 by the phrase "for a specific mining pool." There is no explicit guidance on when to prefer this over get_pools_hashrate, get_hashrate_by_period, or get_pools_hashrate_by_period, which are the most plausible alternatives given the sibling list.

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