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

Annotations already declare readOnlyHint=true, so the read-only safety profile is covered without requiring description reinforcement. The description adds content expectations but no extra operational traits such as date availability, rate limits, or handling of missing dates; it does not contradict the annotations.

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 one front-loaded sentence that states the resource, date format, and output contents without filler. Every clause earns its place, and no information is needlessly repeated from the schema.

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 one required parameter, full schema coverage, an output schema, and a read-only annotation, the description supplies everything an agent needs to select and invoke the tool correctly. Remaining details like empty-date behavior are minor for such a simple read operation.

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 single 'date' parameter is already fully documented in the schema with a regex pattern and a UTC example, giving 100% schema coverage. The description only repeats the YYYY-MM-DD format and adds no meaningful semantics beyond what the schema provides, so the baseline 3 is appropriate.

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 identifies the exact resource ('Geotone's daily global risk briefing'), scopes it to a date, and enumerates the content (coverage surges, tone shifts, notable movers, statistics). This clearly distinguishes it from sibling tools like get_topic, get_trending, get_wire, and search_topics.

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 phrase 'for a date (YYYY-MM-DD)' provides a clear condition for when this tool applies, and the 'briefing' framing implies it is for an analytical daily summary rather than granular lookups. It does not explicitly name alternative tools or when-not-to-use cases, but the context is clear enough to guide selection.

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