'Computer Use' for Policy Interpretation

Elaborate on the `computer_use` tool. How would you design this tool (or extend its capabilities) to allow Claude Opus 4.1 to effectively 'read' and 'understand' complex regulatory documents (e.g., PDF versions of the UK Autonomous Vehicle Act)? Show how the agent would formulate queries for this tool to extract specific clauses, compare policies, and identify ambiguities. Provide example Python code for a more advanced `computer_use` tool handler that can parse document content.