Wire two pins

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

Annotations already declare readOnlyHint=false, idempotentHint=true, and openWorldHint=true. The description adds value beyond these by disclosing the interaction style ('Click-to-wire') and the dependency on live editor state for pin names. This explains why the open-world hint matters in practice. No contradiction with 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 core behavior is front-loaded in the first sentence, and the prerequisite warning is placed last where it reinforces the main guidance. The Args block is somewhat redundant with the fully-covered schema, but it is compact and includes useful example strings, so the overall size is appropriate.

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 simple two-required-parameter action tool, the description covers the core operation, the parameter format, and the critical prerequisite. There is no output schema, and the description does not state what happens on success (e.g., wire appears in circuit or return payload), but the tool's simplicity and the rich annotation set make this a minor gap rather than a blocking one.

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 baseline is 3. The description's Args section largely restates what the schema already documents. It repeats examples like uno.D13 and led1.anode that closely mirror the schema's own examples, adding minimal new semantic meaning.

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: 'Click-to-wire two pins on the open circuit.' This clearly communicates the operation and context. However, it does not explicitly differentiate from siblings like tinkercad_delete_wire or tinkercad_build_circuit, though the meaning is unambiguous enough that an agent would not confuse them.

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 gives an explicit sequencing instruction: 'Call tinkercad_get_circuit first so pin names match what the editor actually exposed.' This is clear, actionable usage context that prevents a realistic failure mode. It does not explicitly name alternatives or state when not to use the tool, so it stops short of a 5.

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