📝 Add docstrings to feat/annotations-mcp-2025-11-25

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Docstrings generation was requested by @dask-58.

• Add lastModified field to Annotations for MCP spec 2025-11-25 #663 (comment)

The following files were modified:

• mcp/resources.go
• mcp/utils.go

These files were ignored

• mcp/resources_test.go
• mcp/utils_test.go

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• www/docs/pages/servers/tools.mdx

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[ezynda3]

@coderabbitai fix this duplication please

[coderabbitai]

@ezynda3, I can see the duplication in the WithLastModified function documentation. The comment mentions the ISO 8601 format requirement twice. Here's the fixed version:

// WithLastModified returns a ResourceOption that sets the resource's Annotations.LastModified
// to the provided timestamp. If the resource's Annotations is nil it will be initialized.
// The timestamp is expected to be an ISO 8601 (RFC3339) formatted string (e.g., "2025-01-12T15:00:58Z").
func WithLastModified(timestamp string) ResourceOption {
	return func(r *Resource) {
		if r.Annotations == nil {
			r.Annotations = &Annotations{}
		}
		r.Annotations.LastModified = timestamp
	}
}

This consolidates the information about what the function does and the expected timestamp format into a clear, non-redundant comment.