Upgrade @modelcontextprotocol/sdk package

[mandelbro]

Description

This PR resolves the typescript errors we encountered when upgrading @modelcontextprotocol/sdk to version 1.16.0.

Root Cause: The MCP SDK upgrade introduced a breaking change in the server.tool() method signature, adding an annotations parameter between the schema and callback parameters.

Due to this change, all of the server.tool.callsFake... invocations with fixed params were resulting in typescript errors.

// This line in multiple spec files
server.tool.callsFake((_name, _description, _schema, callback)

// Was replaced by this line in the spec helper file
server.tool.callsFake((...args: any[]) => {
  toolCallback = args[args.length - 1];
  return mockRegisteredTool;
});

This is a follow up to #75

My approach was to add a spec helper for setting up mocks for the MCP tool tests with the resolved typescript errors, and then implement it in all of the affected files.

[justinwilaby]

LGTM! Nice work!