Add public list_tools() method to CapiscioMCPServer

[beonde]

Context

Discovered during E2E test development (PR capiscio-e2e-tests#28). CapiscioMCPServer has no public method to list registered tools. Tests must access the internal server._tools dict directly.

Current Workaround

# No public API exists
tools = server._tools  # accessing private attribute
assert "my_tool" in tools

Expected API

tools = server.list_tools()  # or server.get_tools()

Impact

• Tests rely on private internals that could change without notice
• Consumers building tool inspection/monitoring have no supported way to enumerate tools

Related

• capiscio-e2e-tests PR Auto-forward CAPISCIO_SERVER_URL → CAPISCIO_REGISTRY_ENDPOINT before spawning Go binary #28