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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds context about the result content (source attribution, publication time, symbols, sentiment) which is useful but not behavioral in nature. It does not describe side effects, rate limits, or prerequisites beyond what annotations imply, so it neither contradicts nor substantially enriches behavioral disclosure.

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 two sentences with no filler. The main purpose is front-loaded, and the output highlights are succinctly listed. Every clause adds value.

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's enumeration of result fields is valuable. It covers the main categories (crypto, stocks, filings) implicitly and explains what to expect. However, it omits ordering, pagination, and parameter usage details, which are minor for a read-only news tool given the annotations already establish safety.

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 only 33% (only 'query' has a description). The tool description does not mention any parameter semantics, so it does not compensate for the gap. It leaves 'limit' and 'category' unexplained beyond the schema's type/enum, failing to clarify the meaning of category values or how query interacts with results.

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 the verb 'Get' and the resource 'recent crypto and US stock news headlines and corporate filing events', and even enumerates the output fields (source attribution, publication time, extracted symbols, sentiment indicator). It is specific about scope but does not explicitly differentiate from sibling tools like find_market_events or get_market_summary, so it stops short of a 5.

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?

The description provides no guidance on when to use this tool versus alternatives, nor any exclusions. It simply states what it does without mentioning conditions or routing to other tools. This leaves the agent to infer suitability from the name and context alone.

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