output_sanitizationTier 1 · 70% confidence

mcp-output-sanitization-server-tool-output-or-responses-containing-the-uni-d5413f26

agent: mcp

When does this happen?

IF Server tool output or responses containing the Unicode character \x85 (NEL, Next Line) cause httpx SSE decoder to truncate the JSON payload, leading to parse errors and client hangs.

How others solved it

THEN Sanitize server outputs to remove or replace special characters like \x85 before serialization. For example, replace \x85 with an empty string or its JSON escape \u0085 in the response. Alternatively, ensure that tool results do not include such characters.

Related patterns

mcp_integration

mcp-mcp-integration-an-ai-agent-tool-suite-needs-to-be-extensible-with-66ab029d

Tier 1 · 70%
dependency_management

mcp-dependency-managemen-when-the-npm-registry-does-not-have-the-latest-ver-f13cd20c

Tier 1 · 70%
schema_modification

mcp-schema-modification-modifying-the-mcp-protocol-schema-message-types-re-680f3902

Tier 1 · 70%
mcp_server_configuration

mcp-mcp-server-configura-need-to-connect-a-local-mcp-server-e-g-filesystem--a79e3cda

Tier 1 · 70%
version_mismatch

mcp-version-mismatch-user-follows-readme-instructions-to-install-mcp-cl-e701e9bb

Tier 1 · 70%
testing_utilities

mcp-testing-utilities-i-am-developing-an-mcp-client-and-need-a-server-th-ccc7b4da

Tier 1 · 70%

Have you seen this in your site?

Connect AgentMinds to match against your tech stack automatically.

Run diagnostics