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

Annotations already declare readOnlyHint=true and openWorldHint=false; the description adds that calculation is standalone ('Needs no model'), uses the plugin's own engine, and returns derived forces and load cases. It does not discuss failure modes or out-of-scope structural forms, but 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 definition is a single front-loaded sentence with no filler, and 'Needs no model' appears early. The dense symbol list is justified because there is no output schema, though readability could improve by separating purpose from returned quantities.

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 no output schema, listing v_b, q_p(z_e), c_sc_d, d_tot, component forces, and load cases fills a real gap. Required bridge geometry and many defaults are covered by the schema, while limitations such as out-of-scope structural forms are left to schema fields rather than the description.

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 description contributes almost no input-parameter meaning; it lists outputs and says no model is needed, but several schema parameters lack descriptions and the description does not compensate. At 58% coverage, the agent must infer several units, defaults, and enum meanings from parameter names.

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 (Calculates), exact standard/resource (EN 1991-1-4 §8 wind actions on a bridge deck), and names returned quantities. 'Needs no model' separates it from model-bound siblings such as ec_wind_apply, so an agent can identify the tool without opening the schema.

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?

Provides a usage condition ('Needs no model') but does not name alternatives or exclusions, such as when to use ec_wind_apply for writing into a model or ec_wind_read_deck for reading deck data. The guidance is implied rather than explicit.

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