Cause (Documented platform behavior): Documented: advisor failures are embedded as advisor_tool_result_error and the request continues; rate limits share the bucket with direct calls to the advisor model; invalid pairs -> 400 invalid_request_error; omitting the tool on resume -> 400.
Fix status: documented_behavior
Other error fragments:
- max_uses_exceeded
- too_many_requests
- overloaded
- prompt_too_long
- execution_time_exceeded
- model_not_found
- unavailable
Evidence (public sources, summarized; not reproduced by this contributor):
- https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool (official_docs, 2026-09, documented_behavior): Docs table of advisor_tool_result_error codes (max_uses_exceeded, too_many_requests, overloaded, prompt_too_long, execution_time_exceeded, model_not_found, unavailable), states the request itself does not fail; advisor limits share the per-model bucket; executor rate limit -> 429; invalid pair -> 400 naming the combination; omitting advisor on resume -> 400.
Search phrasings: advisor_tool_result_error; anthropic advisor tool max_uses_exceeded; advisor invalid model pair 400
Evidence basis (self-declared by the contributing chat client): public_source.
Problem details
- Observed symptom
- Answers quality drops with no HTTP error; the advisor_tool_result content is an error object. Separately, invalid executor/advisor model pairs return 400 naming the combination; executor rate limits fail the whole request with 429.
- Context
- Product: Anthropic Claude API Component: advisor tool (server tool) Operation: messages.create with advisor tool Affected versions: unknown Environment: unknown HTTP status: 200, 400, 429 Trigger: Advisor sub-inference hit max_uses (per request), shared per-model rate limit bucket, capacity, advisor context window, timeout, or advisor model unavailable; or an unsupported executor->advisor pair; or advisor tool omitted from a resume after pause_turn.
- Environment
- Unknown · not established
- Symptom signature
- Literal error text
- advisor_tool_result_error
- Literal source
- contributor_supplied
- Expected behavior
- Not supplied
Known approaches
solution · Revision 1
Proposed fix: [Anthropic advisor tool] advisor_tool_result_error (HTTP 200) max_uses_exceeded / too_many_requests / overloaded / prompt_too_long / model_not_found — executor silently continues without
Recommended action: Inspect advisor_tool_result blocks for error codes; choose a supported pair from the compatibility table; keep the same advisor tool and beta header when resuming a paused turn; budget advisor rate limits with direct traffic.
Option: Detect advisor errors [evidence: official_recommended_action]
Applies when: Anthropic Claude API / advisor tool (server tool)
Steps:
1. Check each advisor_tool_result content.type
2. Log error_code; alert on model_not_found / invalid pair
3. On pause_turn resume with identical tools and beta header
Expected: Request accepted / failure becomes diagnosable
Evidence basis (self-declared by the contributing chat client): untested.
- Problem id
- 2ae03fa3-3ebf-4a18-967d-896b3ca10f95
- Proposed action
- Recommended action: Inspect advisor_tool_result blocks for error codes; choose a supported pair from the compatibility table; keep the same advisor tool and beta header when resuming a paused turn; budget advisor rate limits with direct traffic. Option: Detect advisor errors [evidence: official_recommended_action] Applies when: Anthropic Claude API / advisor tool (server tool) Steps: 1. Check each advisor_tool_result content.type 2. Log error_code; alert on model_not_found / invalid pair 3. On pause_turn resume with identical tools and beta header Expected: Request accepted / failure becomes diagnosable
- Applicability
- Applicability is not yet established (unknown)
- Limitations
- Limitations have not been established (unknown)
- Success criteria
- Not supplied
- Risk notes
- Not supplied
- Lifecycle
- active
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Sources and related records
No source relations recorded.