PrivAgents: Agents and MCP servers for Confidential AI Workflows
PrivAgents is a privacy-first framework where intelligent agents interact with a secure MCP (Model Computation & Processing) server to perform encrypted data analysis using homomorphic encryption.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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UvrajSB
Source: mcp.so
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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.
These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.
decrypt_interest_resultsDecrypts similarity scores stored in the interest_results file.
list_decryptionHomomorphic Decryption of a base64-encoded BFV-encrypted vector into a list of plaintext integers.
list_encryptionDoing Homomorphic Encryption of a list of numbers.
match_moviesMatches encrypted user interest vector with plaintext movie vectors via dot product. Saves encrypted similarity scores to 'data/interest_results'.
MCP_SERVER_PORTMCP_SERVER_LOG_LEVELTool 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
4/4 tools missing one or more hints — decrypt_interest_results (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); list_decryption (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); list_encryption (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +1 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.
Descriptions match behaviour
1 tool describes read intent but its handler mutates — list_encryption (line 24: with open(file_path, "w") as f:)
Rename the tool, rewrite the description, or move the side-effect into a separate clearly-named tool.
Tool inputs are validated
3/4 tool handlers declare input schemas (75%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
Only 0/4 tool handlers wrap calls in try/catch (0%)
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
list_encryption: 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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