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remove_modal_volume_file

Delete files or directories from Modal volumes to manage cloud storage and maintain organized serverless environments.

Instructions

Delete a file or directory from a Modal volume.

Args:
    volume_name: Name of the Modal volume to delete from.
    remote_path: Path to the file or directory to delete.
    recursive: If True, delete directories recursively. Required for deleting directories.

Returns:
    A dictionary containing the result of the delete operation.

Raises:
    Exception: If the delete operation fails for any reason.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
volume_nameYes
remote_pathYes
recursiveNo

Implementation Reference

  • The handler function decorated with @mcp.tool(), which registers and implements the 'remove_modal_volume_file' tool. It runs the 'modal volume rm' command (with optional -r flag) using the helper run_modal_command and returns a formatted success/error response.
    @mcp.tool()
    async def remove_modal_volume_file(volume_name: str, remote_path: str, recursive: bool = False) -> dict[str, Any]:
        """
        Delete a file or directory from a Modal volume.
    
        Args:
            volume_name: Name of the Modal volume to delete from.
            remote_path: Path to the file or directory to delete.
            recursive: If True, delete directories recursively. Required for deleting directories.
    
        Returns:
            A dictionary containing the result of the delete operation.
    
        Raises:
            Exception: If the delete operation fails for any reason.
        """
        try:
            command = ["modal", "volume", "rm"]
            if recursive:
                command.append("-r")
            command.extend([volume_name, remote_path])
            
            result = run_modal_command(command)
            response = {
                "success": result["success"],
                "command": result["command"]
            }
            
            if not result["success"]:
                response["error"] = f"Failed to delete {remote_path}: {result.get('error', 'Unknown error')}"
            else:
                response["message"] = f"Successfully deleted {remote_path} from volume {volume_name}"
                
            if result.get("stdout"):
                response["stdout"] = result["stdout"]
            if result.get("stderr"):
                response["stderr"] = result["stderr"]
                
            return response
        except Exception as e:
            logger.error(f"Failed to delete from Modal volume: {e}")
            raise
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the tool performs a delete operation and mentions potential failure ('Raises: Exception: If the delete operation fails for any reason'), which is useful. However, it lacks details on permissions required, whether deletions are permanent or reversible, rate limits, or what the result dictionary contains. For a destructive tool with zero annotation coverage, this leaves significant gaps in understanding its 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?

The description is appropriately sized and well-structured. It starts with a clear purpose statement, followed by organized sections for 'Args', 'Returns', and 'Raises'. Each sentence adds value without redundancy, making it easy to scan and understand. The formatting enhances readability without unnecessary verbosity.

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

Completeness3/5

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

Given the tool's complexity (destructive operation with 3 parameters), no annotations, and no output schema, the description is moderately complete. It covers the basic purpose and parameters but lacks details on behavioral aspects like safety warnings, output structure, or error handling specifics. For a delete tool, more context on irreversible actions or confirmation steps would improve completeness, but it meets minimum viable standards.

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?

The description adds meaningful semantics beyond the input schema, which has 0% description coverage. It explains each parameter: 'volume_name' as 'Name of the Modal volume to delete from', 'remote_path' as 'Path to the file or directory to delete', and 'recursive' with specific usage context ('If True, delete directories recursively. Required for deleting directories'). This compensates well for the schema's lack of descriptions, though it doesn't cover all potential edge cases.

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

Purpose4/5

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

The description clearly states the tool's purpose: 'Delete a file or directory from a Modal volume.' It specifies the verb ('Delete') and resource ('file or directory from a Modal volume'), distinguishing it from siblings like 'copy_modal_volume_files' or 'get_modal_volume_file'. However, it doesn't explicitly differentiate from other destructive operations like 'deploy_modal_app' beyond the resource scope.

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

Usage Guidelines3/5

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

The description implies usage context through the 'recursive' parameter explanation ('Required for deleting directories'), suggesting when to set this flag. It doesn't provide explicit guidance on when to use this tool versus alternatives like 'list_modal_volume_contents' for checking before deletion or mention any prerequisites. The guidance is functional but not comprehensive.

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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