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

Annotations already declare readOnly/openWorld/idempotent, and the description adds meaningful context: items are aggregated from third-party feeds, returned as quoted external content with publisher and relevance score, and are not BackPow statements of fact. This discloses sourcing and epistemic limits beyond the annotation hints.

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?

Three sentences, each earning its place: the core purpose, the sourcing caveat, and the usage direction with alternatives. The key purpose is front-loaded and no filler is present.

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?

Coverage is strong for a read-only news tool: it explains what the items are, their provenance, and when to use them. A minor gap is the lack of a more detailed return-structure description (e.g., fields like title, URL, date), but the stated publisher-plus-relevance-score shape is sufficient for selecting and invoking the tool.

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 the schema fully documents limit, coin_id, and include_low_signal. The description adds only the notion of filtering to 'one coin', which is already implied by the schema, so it does not significantly exceed the baseline.

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 ('get') and resource ('recent news items about Proof of Work mining and network events'), with an optional coin filter. It clearly distinguishes itself from sibling analytic tools by framing the content as narrative news rather than numerical data.

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?

Explicitly says 'Use when a question turns on recent events' and gives concrete examples (halving, difficulty swing, pool outage, chain upgrade). It also names alternatives for numeric queries: get_coin_oracle and get_cost_of_production.

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