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add_method

Add a new method to an existing class in a source file. Specify the file path, class name, and method code.

Instructions

Add a new method at the end of a class body.

Use this when: You're adding a method to an existing class. Don't use this when: You're adding a field/attribute -> use add_field. You're adding a top-level function (not inside a class) -> use add_top_level.

Example: class_target="LRUCache" content=' def clear(self):\n self.items.clear()'

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
file_pathYes
class_targetYes
contentYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior3/5

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

No annotations provided, so description carries full burden. It reveals the insertion position (end of class body) but lacks details on side effects, validation, or file modification behavior.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Extremely concise: three short sentences plus an example. Each sentence is purposeful and front-loaded with the core operation.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Covers operation, usage guidance, and example. With an output schema present, return values are not needed. Minor gaps: no mention that the class must exist or that file is modified in place.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema has 0% description coverage, but description partially compensates with a concrete example that clarifies class_target and content. However, file_path is not explained.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Clearly states 'Add a new method at the end of a class body.' The verb and resource are specific, and it distinguishes from siblings add_field and add_top_level.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides explicit when-to-use and when-not-to-use with named alternatives: use for adding methods to classes, not for fields (use add_field) or top-level functions (use add_top_level).

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

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