docs: fix grammatical error in tool logic description

[dsmedia]

Corrected subject-verb agreement error in documentation. Changed "as well as implements and executes the tool logic" to "as well as implement and execute the tool logic."

Before: "This means that you define the available tools, with clear descriptions and input schemas, as well as implements and executes the tool logic, such as running a specific function or querying an API at Claude's request."

After: "This means that you define the available tools, with clear descriptions and input schemas, as well as implement and execute the tool logic, such as running a specific function or querying an API at Claude's request."