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GcpAuthProvider: iamconnectorcredentials.credentials:retrieve returns 404 NOT_FOUND with empty details[] for SPIFFE-bound agents despite correct IAM + Agent Registry binding

Status: Open.

#5753 In google/adk-python;

· allentong opened on May 19, 2026

Visibility bump: #3984 / #3991 (AgentTool event streaming propagation) — status update requested

core[Component] This issue is related to the core interface and implementation[Component] This issue is related to the core interface and implementation

needs review[Status] The PR/issue is awaiting review from the maintainer[Status] The PR/issue is awaiting review from the maintainer

Status: Open.

Bug

#5742 In google/adk-python;

· mattmcc-attest opened on May 18, 2026

proposal: ATR detection rules as a community safety plugin

Status: Open.

#5740 In google/adk-python;

· eeee2345 opened on May 18, 2026

responseMimeType.application/json is incompatible with function-calling modes in ADK agent config

core[Component] This issue is related to the core interface and implementation[Component] This issue is related to the core interface and implementation

Status: Open.

Bug

#5735 In google/adk-python;

· hapiiiiGit opened on May 18, 2026

rubric_based_final_response_quality_v1 returns NOT_EVALUATED despite actual_invocation.final_response text

eval[Component] This issue is related to evaluation[Component] This issue is related to evaluation

Status: Open.

Bug

#5732 In google/adk-python;

· txnguyen292 opened on May 17, 2026

DatabaseSessionService.get_session returns all events when num_recent_events=0

request clarification[Status] The maintainer need clarification or more information from the author[Status] The maintainer need clarification or more information from the author

services[Component] This issue is related to runtime services, e.g. sessions, memory, artifacts, etc[Component] This issue is related to runtime services, e.g. sessions, memory, artifacts, etc

Status: Open.

Bug

#5730 In google/adk-python;

· tiino opened on May 17, 2026

MCPToolset "Attempted to exit cancel scope in a different task" under to_a2a() multi-agent (A2A) — scales with concurrent McpToolset count; SSE transport is race-free

tools[Component] This issue is related to tools[Component] This issue is related to tools

Status: Open.

Bug

#5729 In google/adk-python;

· LiuYuWei opened on May 17, 2026

InMemorySessionService allows duplicate events to be appended during concurrent state broadcasts

services[Component] This issue is related to runtime services, e.g. sessions, memory, artifacts, etc[Component] This issue is related to runtime services, e.g. sessions, memory, artifacts, etc

Status: Open.

Bug

#5723 In google/adk-python;

· chriskinzel opened on May 16, 2026

OpenTelemetry contextvars leak across asynchronous generator boundaries in BaseAgent and Runner

request clarification[Status] The maintainer need clarification or more information from the author[Status] The maintainer need clarification or more information from the author

tracing[Component] This issue is related to OpenTelemetry tracing[Component] This issue is related to OpenTelemetry tracing

Status: Open.

Bug

#5722 In google/adk-python;

· chriskinzel opened on May 16, 2026

BaseToolset caches prefixed tools by a single invocation ID, breaking multi-agent concurrency

tools[Component] This issue is related to tools[Component] This issue is related to tools

Status: Open.

Bug

#5721 In google/adk-python;

· chriskinzel opened on May 16, 2026

Agent Engine: _init_session replays all events via append_event causing 429 RESOURCE_EXHAUSTED on long sessions

agent engine[Component] This issue is related to Vertex AI Agent Engine[Component] This issue is related to Vertex AI Agent Engine

Status: Open.

Bug

#5714 In google/adk-python;

· JoeyC1990 opened on May 15, 2026

[LiteLLM] _is_thinking_blocks_format drops Gemini thinking_blocks (only matches Anthropic 'signature' key)

models[Component] Issues related to model support[Component] Issues related to model support

request clarification[Status] The maintainer need clarification or more information from the author[Status] The maintainer need clarification or more information from the author

Status: Open.

Bug

#5712 In google/adk-python;

· ThibaultCoudertSephora opened on May 15, 2026