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

Annotations declare readOnlyHint=false, openWorldHint=false, and destructiveHint=false, so the safety burden is partly lifted, and the description usefully discloses that results are multi-stream and time-windowed. However, it says nothing about what the screening costs (latency, whether it is expensive/compute-heavy), how conviction is ranked, or why a non-read-only hint applies to a screener, leaving the agent guessing about side effects.

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?

A single front-loaded sentence with no filler; the core concept (three converging vectors, time window) leads. Slight density of jargon ('conviction', 'vectors', 'stream') costs a little immediate legibility but nothing is wasted.

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, so return values need not be explained, but the nested criteria object with zero schema descriptions means the agent has no guidance on required vs optional streams, valid sector strings, or the semantics of 'require'. For a tool whose entire utility hinges on how the criteria are composed, the description leaves the critical half of the contract unspecified.

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% and the single 'criteria' parameter is a nested object with four undocumented sub-fields (limit, sector, require, window_days). The description only obliquely references 'window' (window_days); it never explains that 'require' selects which of the three signal streams must be present, nor what 'sector' or 'limit' constrain. With low coverage the description should compensate and does not.

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 states a specific verb-and-resource combination ('screening surfacing high-conviction tickers') and names the three signal streams it combines: federal contracts, insider buying, and congressional trades. That is more specific than a generic screener, but it never contrasts itself with near neighbours such as get_top_signals or get_precursor_signals, so an agent cannot tell from the description alone which convergence-flavoured tool to pick.

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 'within a specified window' implies the time-filter use case and the 'align' phrasing implies the multi-signal requirement, so the intended usage is inferable. But there is no explicit statement of when to call this versus get_top_signals, get_precursor_signals, or get_policy_affected_companies, and no mention of when not to use it.

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