agents: Update calling-agents.mdx

[elithrar]

OK

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PR Change Summary

Updated the documentation for calling agents to include information on calling other agents and building multi-agent systems.

• Added a note on calling other Agents within an Agent.
• Clarified that calling other Agents uses the same APIs as calling into an Agent directly.
• Updated the section on calling methods on Agents to include WebSocket connections.

Modified Files

• src/content/docs/agents/api-reference/calling-agents.mdx

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[github-actions]

Preview URL: https://598cf6b8.preview.developers.cloudflare.com
Preview Branch URL: https://elithrar-patch-25.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/agents/api-reference/calling-agents/	https://elithrar-patch-25.preview.developers.cloudflare.com/agents/api-reference/calling-agents/