Lack of description and incorrect example for the use_mcp_tool.

[R-omk]

The model frequently makes mistakes in specifying the instrument name when calling it; it constantly indicates use_mcp_tool instead of the specific name available in the instrument.

I compared the original prompt to what was obtained after processing.

Original:

## use_mcp_tool
Description: Request to use a tool provided by a connected MCP server. Each MCP server can provide multiple tools with different capabilities. Tools have defined input schemas that specify required and optional parameters.
Parameters:
- server_name: (required) The name of the MCP server providing the tool
- tool_name: (required) The name of the tool to execute
- arguments: (required) A JSON object containing the tool's input parameters, following the tool's input schema
Usage:
<use_mcp_tool>
<server_name>server name here</server_name>
<tool_name>tool name here</tool_name>
<arguments>
{
  "param1": "value1",
  "param2": "value2"
}
</arguments>
</use_mcp_tool>

Example: Requesting to use an MCP tool

<use_mcp_tool>
<server_name>weather-server</server_name>
<tool_name>get_forecast</tool_name>
<arguments>
{
  "city": "San Francisco",
  "days": 5
}
</arguments>
</use_mcp_tool>

And here is a very poor description after processing, and there is a bug here - the instrument name is incorrect; I even had to create an issue because this revealed a bug in the roo code.

## use_mcp_tool
Usage:
use_mcp_tool.server name here.use_mcp_tool arguments: {"param1": "value1", "param2": "value2"}

Example: Requesting to use an MCP tool

use_mcp_tool.weather-server.use_mcp_tool arguments: {"city": "San Francisco", "days": 5}

Here, the instrument name get_forecast is lost (there is also no description).

[irreg]

I fixed an error in the process that converts XML mcp calls to tool calls.
Tool definitions were correct, so tools could be called, but the LLM was unable to correctly recognize the history of previously called tools.

Regarding the description, it has been moved to the tool description.
It has been removed from messages but remains in the tool definition.

[R-omk]

Yes, I just now understood where the descriptions went; but due to removal from the system prompt, an empty Available Tools section resulted. Perhaps it would be better to simply list the names of the tools in it (without description) or remove this section altogether.