mcp-youtube-transcript (of3y/mcp-youtube-transcript) is an MCP server listed on the M8ven Trust Index. It scores 35 out of 100, grade F. It declares 46 tools. No publisher has claimed this listing.
Extracts YouTube transcripts and performs AI-powered video analysis for Claude Desktop, enabling transcript retrieval, quality analysis, and smart resource management.
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of3y
Source: Glama
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Install from
The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
ANTHROPIC_API_KEYOPENAI_API_KEYYT_DEFAULT_LANGYT_MAX_COMMENTSYT_COMMENT_SORTYT_ENABLE_REPLIESYT_MAX_REPLIESYT_OUTPUT_DIRYT_TIMEOUTYT_AGGRESSIVE_DEDUPLOG_LEVELCACHE_SIZEDEFAULT_LANGUAGEMAX_OUTPUT_CHARSENABLE_SMART_TRUNCATIONAGGRESSIVE_DEDUPTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
46/46 tools missing one or more hints — create_mcp_resource_from_transcript_v2 (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_transcript_quality_analysis (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_youtube_transcript (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +43 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Destructive tools are labelled
1 tool perform destructive updates without destructiveHint — get_youtube_transcript_ytdlp deletes at line 583 (shutil.rmtree(temp_dir))
Add destructiveHint:true to any tool whose handler calls .delete(), .upsert(), .update(), unlink, rm, DELETE, DROP, REPLACE INTO, or any operation that overwrites existing data.
Descriptions match behaviour
1 tool describes read intent but its handler mutates — get_youtube_transcript_ytdlp (line 583: shutil.rmtree(temp_dir))
Rename the tool, rewrite the description, or move the side-effect into a separate clearly-named tool.
Tool inputs are validated
33/46 tool handlers declare input schemas (72%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
29/46 tool handlers wrap calls in try/catch (63%)
Wrap each tool handler body in try/catch and return a structured error response.
License file
No license file
Add a LICENSE file (MIT, Apache-2.0, etc.).
Tests exist
No test files found
Add tests that exercise each declared tool.
Tool description accuracy
get_youtube_transcript_ytdlp: description implies read-only but handler writes/deletes/executes
Update tool descriptions to accurately reflect all capabilities — especially write, delete, or execute operations.
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