High-risk tools in Mcp Signer
4 of the 4 tools in Mcp Signer are classified as high risk. This page profiles those tools specifically, with recommended policy actions and the attack patterns that target them.
Every operation listed below is an action PolicyLayer recommends controlling at the transport layer. Open any tool to see the full profile, risk score, and YAML policy snippet.
Tools at high risk
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evm_signExecuteSign an EVM transaction. Two actions: (1) sign-unsigned-hex: sign pre-built unsigned tx hex; (2) sign-from-details: build and sign from fields (blockchain, network, toAddress, v...
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tron_signExecuteSign a Tron transaction (no TronWeb): Node crypto (sha256) + elliptic (secp256k1) + minimal protobuf encode/decode. Two actions: (1) sign-from-details: sign from transaction obj...
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utxo_signExecuteSign a UTXO transaction (bitcoin, bitcoin-cash, litecoin, dogecoin, dash, zcash). Two actions: (1) sign-from-details: sign from prepared transaction object (e.g. HD wallet prepa...
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xrp_signExecuteSign an XRP (Ripple) transaction. Two actions: (1) sign-from-details: sign from transaction object (JSON); (2) sign-unsigned-hex: sign from raw unsigned tx hex (XRPL serialized)...
Attacks that target this class
High-risk tools in any server share these documented attack patterns. Each links to the full case and the defensive policy.