Update Claude Project File

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

With no annotations provided, the description must disclose behavioral traits. It states the tool creates or updates files, but fails to mention crucial details such as whether it overwrites existing content, size limits, permission requirements, or the behavior for invalid project names. This lack of transparency is a significant gap for a file 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 extremely concise: two sentences that immediately convey the core action and scope. Every word adds value with no redundancy or fluff.

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 complexity of file operations (3 required params, output schema present), the description covers the basic action and special files but omits important context like overwrite behavior and project existence requirements. It is adequate but not fully complete for safe and effective tool invocation.

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?

Input schema has 100% description coverage, but the description adds value by specifying special filenames (INSTRUCTIONS.xml, PURPOSE.md) and clarifying that new files can be created. This context helps the agent understand the parameter purpose beyond the basic schema descriptions.

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 clearly states the action ('Create or update'), the resource ('file in a Claude.ai project folder'), and gives specific examples ('INSTRUCTIONS.xml, PURPOSE.md, or create new files'). This distinguishes it from sibling tools like create_claude_project (which creates the project itself) and other update tools focused on different entities.

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 implies usage by mentioning the ability to update specific files and create new ones, but it does not provide explicit guidance on when to use this tool versus alternatives, nor does it state when not to use it. No exclusions or comparisons to sibling tools are given.

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