Add Circuits component

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

Annotations already convey readOnly=false, destructive=false, and openWorld=true. The description adds valuable behavioral context by stating that the tool returns an updated circuit snapshot and recommending that returned component ids be reused for later wiring. It also discloses two error conditions. This goes meaningfully beyond the annotation-only view, though it does not discuss auth, rate limits, or coordinate behavior.

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 compact and well-organized into Args, Returns, and Error Handling. The opening sentence is immediately informative, and every section earns its place without redundant prose or schema repetition beyond a terse arg list.

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?

Given the moderate complexity, full schema coverage, and presence of annotations, the description is sufficiently complete. It covers the core action, return behavior, prerequisite failure handling, and gives a practical follow-up hint about using returned component ids for wiring. An agent has enough information to invoke this tool correctly in context.

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 input schema already documents all four parameters with defaults, ranges, and examples. The description mostly summarizes these instead of adding new semantic insight. It does note in the Returns section that ids from the updated snapshot should be used later, which is useful but not param-specific.

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 opens with a concrete action: 'Search the Circuits parts panel and drop a component onto the canvas.' This clearly identifies the tool's verb, resource, and purpose. It is naturally distinguishable from siblings like tinkercad_move_component, tinkercad_delete_component, and tinkercad_connect_pins.

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 Error Handling section gives explicit conditional guidance: unknown parts should route to tinkercad_list_components, and a closed editor should route to tinkercad_open_circuit first. This tells an agent when prerequisites are needed and provides alternatives for failure cases, though it does not exhaustively contrast against every sibling such as move or delete.

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