[awais-ur-rehman]

Summary

The MRKL example passes WithMaxIterations(3) to the agent, where it has no effect on the executor's limit. Pass it to NewExecutor so the example stops after three iterations as intended.

Fixes #1201.

Breaking Changes

None.

Testing

• Go 1.26.10: go test -race -short ./agents passed.
• go build . in examples/mrkl-agent-example passed.
• Offline reproduction using fake.NewFakeLLM and a counting tool: the original construction executes five tool calls; the corrected construction executes three. Both end with ErrNotFinished.
• git diff --check passed. Live OpenAI/SerpAPI execution and the full integration suite were not run.

PR Checklist

• Read CONTRIBUTING.md and CODE_OF_CONDUCT.md.
• Checked existing PRs and issues for an equivalent fix.
• Described the defect and linked the issue.
• Uses the existing executor option; adds no new concept or function.
• Verified the example build and existing executor tests.

OpenAI Codex assisted with investigation and validation.