calculate_trace_fusing_current

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

Annotations already cover read-only, idempotent, non-destructive behavior, and the description adds meaningful domain context beyond them: adiabatic assumption, specific computed outputs (fusing current, time-to-melt, delamination threshold, I²t), and the >=2.0x protection coordination criterion. It does not contradict any annotation. The only minor gap is that it does not describe the return structure or units of the computed results.

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 front-loaded with the standard references and core computation, and every clause conveys technical content. It is dense—one long sentence covering models, outputs, scope, and threshold—but not padded with filler.

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 complex engineering calculation with no output schema, the description enumerates the key outputs and states the verification threshold, which is enough for an agent to understand what the tool returns. Combined with complete parameter descriptions and safety annotations, it is largely self-sufficient, though an explicit note on output format would make it fully complete.

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 100%, so the schema already documents all eight parameters with defaults and units; baseline 3 applies. The description adds only marginal semantic context by mentioning internal/external traces and upstream fuse coordination, which map loosely to a few parameters, without elaborating on parameter interactions or constraints.

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: computing short-time transient conductor fusing current and burnout, with standards (IPC-2152 §5.3, Onderdonk) and scope (internal/external traces). It implicitly distinguishes itself from steady-state siblings like calculate_ipc2152_trace_current by emphasizing 'transient' and 'fusing,' but does not explicitly name the sibling or contrast the two.

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 'verifying upstream fuse/PTC protection coordination margin (>=2.0x)' implies a clear application context, but there is no explicit 'use this when…' guidance, no exclusions, and no named alternative for steady-state ampacity checks. An agent must infer usage from the description rather than being routed to the correct tool among many siblings.

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