docs: document callable agent factories

[Coda-slack-bot]

Summary

• document callable tools and knowledge factories on the Agent reference page
• add the callable factory caching controls to the Agent parameter table
• tighten the Building Agents coverage so it shows both factory types and the caching behavior

Evidence from SDK

• agno/libs/agno/agno/agent/agent.py:143-166 supports callable knowledge and tools
• agno/libs/agno/agno/agent/agent.py:368-374,491-493,700-705 defines and stores cache_callables, callable_tools_cache_key, and callable_knowledge_cache_key
• agno/libs/agno/agno/utils/callables.py:65-90,133-173,213-249,294-329 injects run_context and session_state, computes cache keys, and resolves cached callable factories

[mintlify]

Preview deployment for your docs. Learn more about Mintlify Previews.

Project	Status	Preview	Updated (UTC)
agno	🟢 Ready	View Preview	Apr 16, 2026, 5:40 PM

💡 Tip: Enable Workflows to automatically generate PRs for you.