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apply_patch

Apply unified diffs to files using git apply, with directory boundary protection. Run with check_only to validate before applying changes.

Instructions

Apply an agent-generated unified diff to files under target_path.

Uses git apply, which refuses paths that escape the target directory. Run with check_only=True first to verify the patch applies cleanly before writing changes.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
target_pathYesDirectory the patch paths are relative to.
patchYesThe unified diff text to apply.
check_onlyNoIf True, validate without modifying any files.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

No annotations provided; description informs that git apply is used and refuses paths escaping target directory, which is a key safety behavior. Covers destructive nature implicitly.

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?

Three sentences, each adding value: purpose, safety mechanism, usage recommendation. No superfluous words.

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

Completeness5/5

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

Given the tool's simplicity (3 parameters, straightforward behavior), the description is complete: explains what, how (git apply), safety check, and options.

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

Parameters3/5

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

Schema coverage is 100%, and description adds minimal additional meaning beyond schema descriptions. Slightly rephrases schema but does not add new constraints or examples.

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?

Description clearly states the tool applies a unified diff to files under target_path using git apply. It specifies the verb 'apply' and resource, and no sibling tool performs similar function.

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

Usage Guidelines4/5

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

Explicitly recommends using check_only=True first to verify the patch applies cleanly before writing changes, providing a clear workflow guideline. Does not mention when not to use, but siblings are distinct.

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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