Run formatter on mcp.md docs

[margaretkennedy]

This PR applies formatting changes to the MCP documentation files using the docs/format tool. This should be merged into the jj-858-mcp branch to update PR deephaven#7267.

[github-actions]

Pull Request titles must follow the Conventional Commits specification.
Breaking changes that are expected to impact users must include "BREAKING CHANGE: " at the end of the PR description.

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Available types:
 - feat: A new feature
 - fix: A bug fix
 - docs: Documentation only changes
 - style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
 - refactor: A code change that neither fixes a bug nor adds a feature
 - perf: A code change that improves performance
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