add_junctions

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

Annotations provide no hints (all false), so the description must disclose behavior. It only says 'Add' and describes arguments, but doesn't mention side effects such as modifying the schematic file, whether it requires an existing open project, or what happens on invalid input. This is a significant transparency gap for a mutation tool.

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 concise and front-loaded with the core action. The Args list is compact and directly pairs each parameter with its type and purpose. No unnecessary words or redundancy; every sentence earns its place.

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 presence of an output schema, return-value details are not needed. However, the description lacks context about the modification workflow (e.g., whether this is a file-writing operation, how it interacts with existing wires). For a simple mutation tool it's borderline adequate, but an agent would still have open questions about side effects and prerequisites.

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%, so the description carries the parameter-documentation burden. It adds meaningful context: 'points' is a list of junction positions with x/y keys, and 'schematic_path' is an optional path to a .kicad_sch file with a configured default. This goes beyond the schema titles and provides usable guidance, though it could detail coordinate units.

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 'Add multiple junctions', which is a clear verb+resource combination. It distinguishes itself from related tools like remove_junction by being explicitly additive and plural, though it doesn't reference alternatives or scope in a way that fully differentiates it from other schematic-modification tools.

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?

There is no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., an existing schematic) or situations where adding junctions is appropriate. The description simply states what it does without any 'use this when' or exclusion criteria.

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