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

With no annotations, the description carries the full burden of behavioral disclosure. It says the tool 'builds' a briefing, implying aggregation/synthesis, but does not disclose whether it mutates state, how it selects or ranks signals, whether it caches, or what the output structure looks like. This is a meaningful gap for a tool that appears to synthesize data.

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 a single, compact sentence that front-loads the core purpose ('Build a compact briefing and action queue') and includes the key qualifier ('from the latest source-backed signals'). No wasted words.

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?

For a tool with one optional parameter and no output schema, the description is mostly adequate, but it lacks any detail about the output format or how the briefing is constructed. Given the sibling tools include raw signal access, an agent would benefit from knowing whether this returns a summary object, a list, or something else.

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%, so the description must compensate. The description does not mention the 'limit' parameter at all, but the schema itself provides a clear name, type, default, and bounds, which is reasonably self-documenting. The description adds no semantic meaning beyond the schema, so a 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 uses a specific verb ('Build') and names the resource ('a compact briefing and action queue') derived from 'latest source-backed signals.' It clearly distinguishes the tool's purpose from siblings like get_latest_signals or search_signals, though it doesn't explicitly name a sibling.

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 implies this is the tool to use when a synthesized briefing/action queue is needed rather than raw signals, but it does not explicitly state when to use it versus get_latest_signals or search_signals. No exclusions or alternative routing are provided.

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