[BUG] tavily-mcp@0.1.3 cannot pass the tool name validation in Strands

[xiehust]

Checks

• I have updated to the lastest minor and patch version of Strands
• I have checked the documentation and this is not expected behavior
• I have searched ./issues and there are no duplicates of my issue

Strands Version

0.1.2

Python Version

3.13.2

Operating System

ubuntu

Installation Method

pip

Steps to Reproduce

I am buiding a agent with MCP server from tavily search https://docs.tavily.com/documentation/mcp
however it raises exception :

tool_name=<tavily-search> | invalid tool name pattern

than I looked at the code,

sdk-python/src/strands/tools/tools.py

Line 50 in 912e110

tool_name_pattern = r"^[a-zA-Z][a-zA-Z0-9_]*$"

it seems that the validation regex did not include pattern as "tavily-search".

def validate_tool_use_name(tool: ToolUse) -> None:
    """Validate the name of a tool use.

    Args:
        tool: The tool use to validate.

    Raises:
        InvalidToolUseNameException: If the tool name is invalid.
    """
    # We need to fix some typing here, because we dont actually expect a ToolUse, but dict[str, Any]
    if "name" not in tool:
        message = "tool name missing"  # type: ignore[unreachable]
        logger.warning(message)
        raise InvalidToolUseNameException(message)

    tool_name = tool["name"]
    tool_name_pattern = r"^[a-zA-Z][a-zA-Z0-9_]*$"

Expected Behavior

should pass the validation, as tavily mcp is widely used in agents

Actual Behavior

failed to pass the name validation

Additional Context

No response

Possible Solution

tool_name_pattern = r"^[a-zA-Z][a-zA-Z0-9_-]*$" # Added hyphen to allowed characters

Related Issues

No response

[ybalbert001]

I reproduce this bug

[zastrowm]

Fixed by #55

[zastrowm]

Created #139 to track direct method invocation of tools with hyphen in the name

[mrityunjayshukla]

@zastrowm is there an ETA to merge the fix for this bug?

[zastrowm]

@zastrowm is there an ETA to merge the fix for this bug?

#55 fixes this and was merged yesterday. It should be available the next time we release to pypi