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by io.github.assetfare
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assetfare_v2_session_observe_source

Idempotent

Record source hashes the caller already signed and submitted, then advance the workflow. Example: pass one finalized source hash, a new idempotency key, and the original verification_context. Any next current_action is deeply verified and receives a wallet handoff. AssetFare never signs or submits.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
session_idYesV2 workflow session UUID returned by assetfare_v2_session_create. Use only with assetfare_v2_session_* tools; do not pass a legacy session ID.
session_tokenYesSensitive caller-generated v2 session capability: at least 32 CSPRNG bytes encoded as 43-128 URL-safe base64 characters. Generate it locally; never log it or substitute a private key or legacy access token.
idempotency_keyYesCaller-generated retry key, 8-128 characters. Reuse it only when retrying the same logical mutation; choose a new key for a new operation. Strict approval_v3 requests additionally enforce its ASCII key pattern.
transaction_hashesYesOne to eight hashes for source transactions the caller already signed and submitted. Do not provide unsigned payloads or destination hashes.
verification_contextYesStrict caller-held context copied from the selected quote and approval. It contains public intent/wallet data only, never the raw session token or a private key, and is required whenever a remote MCP session call can return current_action.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
signedYes
statusYes
submittedYes
session_idYes
quote_bindingYes
current_actionYes
server_signingYes
action_availableYes
server_submissionYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed8 schema fields changed
    • changedInput schema / properties / verification_context / properties / direct_route_summary / properties / from / enum
      Previous value: -[
-  "solana:SOL",
-  "solana:USDC",
-  "solana:USDG",
-  "base:ETH",
-  "base:USDC",
-  "arbitrum:ETH",
-  "arbitrum:USDC",
-  "robinhood:ETH",
-  "robinhood:USDG",
-  "polygon:USDC",
-  "optimism:USDC",
-  "ethereum:USDC",
-  "hyperevm:USDC",
-  "xlayer:USDC",
-  "sei:USDC",
-  "sonic:USDC"
-]New value: +[
+  "solana:SOL",
+  "solana:USDC",
+  "solana:USDG",
+  "base:ETH",
+  "base:USDC",
+  "arbitrum:ETH",
+  "arbitrum:USDC",
+  "robinhood:ETH",
+  "robinhood:USDG",
+  "polygon:USDC",
+  "optimism:USDC",
+  "ethereum:USDC",
+  "hyperevm:USDC",
+  "xlayer:USDC",
+  "sei:USDC",
+  "sonic:USDC",
+  "monad:USDC",
+  "avalanche:USDC",
+  "cronos:USDC",
+  "injective:USDC",
+  "linea:USDC",
+  "aptos:USDC"
+]
    • changedInput schema / properties / verification_context / properties / direct_route_summary / properties / mode / enum
      Previous value: -[
-  "cctp_direct_composition",
-  "optimism_source_cctp",
-  "polygon_source_cctp",
-  "robinhood_across_ingress_composition",
-  "robinhood_paxos_egress_composition",
-  "robinhood_paxos_ingress_composition",
-  "same_chain_direct",
-  "same_chain_direct_composition"
-]New value: +[
+  "aptos_move_cctp_direct",
+  "cctp_direct_composition",
+  "optimism_source_cctp",
+  "polygon_source_cctp",
+  "robinhood_across_ingress_composition",
+  "robinhood_paxos_egress_composition",
+  "robinhood_paxos_ingress_composition",
+  "same_chain_direct",
+  "same_chain_direct_composition"
+]
    • changedInput schema / properties / verification_context / properties / direct_route_summary / properties / route / enum
      Previous value: -[
-  "solana:SOL->solana:USDC",
-  "solana:SOL->solana:USDG",
-  "solana:SOL->base:ETH",
-  "solana:SOL->base:USDC",
-  "solana:SOL->arbitrum:ETH",
-  "solana:SOL->arbitrum:USDC",
-  "solana:SOL->robinhood:ETH",
-  "solana:SOL->robinhood:USDG",
-  "solana:USDC->solana:SOL",
-  "solana:USDC->solana:USDG",
-  "solana:USDC->base:ETH",
-  "solana:USDC->base:USDC",
-  "solana:USDC->arbitrum:ETH",
-  "solana:USDC->arbitrum:USDC",
-  "solana:USDC->robinhood:ETH",
-  "solana:USDC->robinhood:USDG",
-  "solana:USDG->solana:SOL",
-  "solana:USDG->solana:USDC",
-  "solana:USDG->base:ETH",
-  "solana:USDG->base:USDC",
-  "solana:USDG->arbitrum:ETH",
-  "solana:USDG->arbitrum:USDC",
-  "solana:USDG->robinhood:ETH",
-  "solana:USDG->robinhood:USDG",
-  "base:ETH->solana:SOL",
-  "base:ETH->solana:USDC",
-  "base:ETH->solana:USDG",
-  "base:ETH->base:USDC",
-  "base:ETH->arbitrum:ETH",
-  "base:ETH->arbitrum:USDC",
-  "base:ETH->robinhood:ETH",
-  "base:ETH->robinhood:USDG",
-  "base:USDC->solana:SOL",
-  "base:USDC->solana:USDC",
-  "base:USDC->solana:USDG",
-  "base:USDC->base:ETH",
-  "base:USDC->arbitrum:ETH",
-  "base:USDC->arbitrum:USDC",
-  "base:USDC->robinhood:ETH",
-  "base:USDC->robinhood:USDG",
-  "arbitrum:ETH->solana:SOL",
-  "arbitrum:ETH->solana:USDC",
-  "arbitrum:ETH->solana:USDG",
-  "arbitrum:ETH->base:ETH",
-  "arbitrum:ETH->base:USDC",
-  "arbitrum:ETH->arbitrum:USDC",
-  "arbitrum:ETH->robinhood:ETH",
-  "arbitrum:ETH->robinhood:USDG",
-  "arbitrum:USDC->solana:SOL",
-  "arbitrum:USDC->solana:USDC",
-  "arbitrum:USDC->solana:USDG",
-  "arbitrum:USDC->base:ETH",
-  "arbitrum:USDC->base:USDC",
-  "arbitrum:USDC->arbitrum:ETH",
-  "arbitrum:USDC->robinhood:ETH",
-  "arbitrum:USDC->robinhood:USDG",
-  "robinhood:ETH->solana:SOL",
-  "robinhood:ETH->solana:USDC",
-  "robinhood:ETH->solana:USDG",
-  "robinhood:ETH->base:ETH",
-  "robinhood:ETH->base:USDC",
-  "robinhood:ETH->arbitrum:ETH",
-  "robinhood:ETH->arbitrum:USDC",
-  "robinhood:ETH->robinhood:USDG",
-  "robinhood:USDG->solana:SOL",
-  "robinhood:USDG->solana:USDC",
-  "robinhood:USDG->solana:USDG",
-  "robinhood:USDG->base:ETH",
-  "robinhood:USDG->base:USDC",
-  "robinhood:USDG->arbitrum:ETH",
-  "robinhood:USDG->arbitrum:USDC",
-  "robinhood:USDG->robinhood:ETH",
-  "polygon:USDC->base:USDC",
-  "polygon:USDC->arbitrum:USDC",
-  "optimism:USDC->base:USDC",
-  "optimism:USDC->arbitrum:USDC",
-  "ethereum:USDC->solana:USDC",
-  "ethereum:USDC->base:USDC",
-  "hyperevm:USDC->solana:USDC",
-  "hyperevm:USDC->base:USDC",
-  "xlayer:USDC->solana:USDC",
-  "xlayer:USDC->base:USDC",
-  "sei:USDC->solana:USDC",
-  "sei:USDC->base:USDC",
-  "sonic:USDC->solana:USDC",
-  "sonic:USDC->base:USDC"
-]New value: +[
+  "solana:SOL->solana:USDC",
+  "solana:SOL->solana:USDG",
+  "solana:SOL->base:ETH",
+  "solana:SOL->base:USDC",
+  "solana:SOL->arbitrum:ETH",
+  "solana:SOL->arbitrum:USDC",
+  "solana:SOL->robinhood:ETH",
+  "solana:SOL->robinhood:USDG",
+  "solana:USDC->solana:SOL",
+  "solana:USDC->solana:USDG",
+  "solana:USDC->base:ETH",
+  "solana:USDC->base:USDC",
+  "solana:USDC->arbitrum:ETH",
+  "solana:USDC->arbitrum:USDC",
+  "solana:USDC->robinhood:ETH",
+  "solana:USDC->robinhood:USDG",
+  "solana:USDG->solana:SOL",
+  "solana:USDG->solana:USDC",
+  "solana:USDG->base:ETH",
+  "solana:USDG->base:USDC",
+  "solana:USDG->arbitrum:ETH",
+  "solana:USDG->arbitrum:USDC",
+  "solana:USDG->robinhood:ETH",
+  "solana:USDG->robinhood:USDG",
+  "base:ETH->solana:SOL",
+  "base:ETH->solana:USDC",
+  "base:ETH->solana:USDG",
+  "base:ETH->base:USDC",
+  "base:ETH->arbitrum:ETH",
+  "base:ETH->arbitrum:USDC",
+  "base:ETH->robinhood:ETH",
+  "base:ETH->robinhood:USDG",
+  "base:USDC->solana:SOL",
+  "base:USDC->solana:USDC",
+  "base:USDC->solana:USDG",
+  "base:USDC->base:ETH",
+  "base:USDC->arbitrum:ETH",
+  "base:USDC->arbitrum:USDC",
+  "base:USDC->robinhood:ETH",
+  "base:USDC->robinhood:USDG",
+  "arbitrum:ETH->solana:SOL",
+  "arbitrum:ETH->solana:USDC",
+  "arbitrum:ETH->solana:USDG",
+  "arbitrum:ETH->base:ETH",
+  "arbitrum:ETH->base:USDC",
+  "arbitrum:ETH->arbitrum:USDC",
+  "arbitrum:ETH->robinhood:ETH",
+  "arbitrum:ETH->robinhood:USDG",
+  "arbitrum:USDC->solana:SOL",
+  "arbitrum:USDC->solana:USDC",
+  "arbitrum:USDC->solana:USDG",
+  "arbitrum:USDC->base:ETH",
+  "arbitrum:USDC->base:USDC",
+  "arbitrum:USDC->arbitrum:ETH",
+  "arbitrum:USDC->robinhood:ETH",
+  "arbitrum:USDC->robinhood:USDG",
+  "robinhood:ETH->solana:SOL",
+  "robinhood:ETH->solana:USDC",
+  "robinhood:ETH->solana:USDG",
+  "robinhood:ETH->base:ETH",
+  "robinhood:ETH->base:USDC",
+  "robinhood:ETH->arbitrum:ETH",
+  "robinhood:ETH->arbitrum:USDC",
+  "robinhood:ETH->robinhood:USDG",
+  "robinhood:USDG->solana:SOL",
+  "robinhood:USDG->solana:USDC",
+  "robinhood:USDG->solana:USDG",
+  "robinhood:USDG->base:ETH",
+  "robinhood:USDG->base:USDC",
+  "robinhood:USDG->arbitrum:ETH",
+  "robinhood:USDG->arbitrum:USDC",
+  "robinhood:USDG->robinhood:ETH",
+  "polygon:USDC->base:USDC",
+  "polygon:USDC->arbitrum:USDC",
+  "optimism:USDC->base:USDC",
+  "optimism:USDC->arbitrum:USDC",
+  "ethereum:USDC->solana:USDC",
+  "ethereum:USDC->base:USDC",
+  "hyperevm:USDC->solana:USDC",
+  "hyperevm:USDC->base:USDC",
+  "xlayer:USDC->solana:USDC",
+  "xlayer:USDC->base:USDC",
+  "sei:USDC->solana:USDC",
+  "sei:USDC->base:USDC",
+  "sonic:USDC->solana:USDC",
+  "sonic:USDC->base:USDC",
+  "monad:USDC->solana:USDC",
+  "monad:USDC->base:USDC",
+  "avalanche:USDC->solana:USDC",
+  "avalanche:USDC->base:USDC",
+  "cronos:USDC->solana:USDC",
+  "cronos:USDC->base:USDC",
+  "injective:USDC->solana:USDC",
+  "injective:USDC->base:USDC",
+  "linea:USDC->solana:USDC",
+  "linea:USDC->base:USDC",
+  "aptos:USDC->solana:USDC",
+  "aptos:USDC->base:USDC"
+]
    • changedInput schema / properties / verification_context / properties / direct_route_summary / properties / steps / items / properties / from / enum
      Previous value: -[
-  "solana:SOL",
-  "solana:USDC",
-  "solana:USDG",
-  "base:ETH",
-  "base:USDC",
-  "arbitrum:ETH",
-  "arbitrum:USDC",
-  "robinhood:ETH",
-  "robinhood:USDG",
-  "polygon:USDC",
-  "optimism:USDC",
-  "ethereum:USDC",
-  "hyperevm:USDC",
-  "xlayer:USDC",
-  "sei:USDC",
-  "sonic:USDC"
-]New value: +[
+  "solana:SOL",
+  "solana:USDC",
+  "solana:USDG",
+  "base:ETH",
+  "base:USDC",
+  "arbitrum:ETH",
+  "arbitrum:USDC",
+  "robinhood:ETH",
+  "robinhood:USDG",
+  "polygon:USDC",
+  "optimism:USDC",
+  "ethereum:USDC",
+  "hyperevm:USDC",
+  "xlayer:USDC",
+  "sei:USDC",
+  "sonic:USDC",
+  "monad:USDC",
+  "avalanche:USDC",
+  "cronos:USDC",
+  "injective:USDC",
+  "linea:USDC",
+  "aptos:USDC"
+]
    • changedInput schema / properties / verification_context / properties / intent / properties / from_chain / description
      Previous value: -"Source chain for the v2 route. Polygon, Optimism, Ethereum, HyperEVM, X Layer, Sei and Sonic are source-only and cannot be used as to_chain."New value: +"Source chain for the v2 route. Polygon, Optimism, Ethereum, HyperEVM, X Layer, Sei, Sonic, Monad, Avalanche, Cronos, Injective, Linea, and Aptos are source-only and cannot be used as to_chain."
    • changedInput schema / properties / verification_context / properties / intent / properties / from_chain / enum
      Previous value: -[
-  "solana",
-  "base",
-  "arbitrum",
-  "robinhood",
-  "polygon",
-  "optimism",
-  "ethereum",
-  "hyperevm",
-  "xlayer",
-  "sei",
-  "sonic"
-]New value: +[
+  "solana",
+  "base",
+  "arbitrum",
+  "robinhood",
+  "polygon",
+  "optimism",
+  "ethereum",
+  "hyperevm",
+  "xlayer",
+  "sei",
+  "sonic",
+  "monad",
+  "avalanche",
+  "cronos",
+  "injective",
+  "linea",
+  "aptos"
+]
    • changedInput schema / properties / verification_context / properties / wallets / additionalProperties / description
      Previous value: -"Caller-owned public wallet address: 0x plus 40 hex characters for EVM, or 32-44 base58 characters for Solana. Never provide secret key material."New value: +"Caller-owned public wallet address: 0x plus 40 hex characters for EVM, 0x plus 64 hex characters for Aptos, or 32-44 base58 characters for Solana. Never provide secret key material."
    • changedInput schema / properties / verification_context / properties / wallets / propertyNames / enum
      Previous value: -[
-  "solana",
-  "base",
-  "arbitrum",
-  "robinhood",
-  "polygon",
-  "optimism",
-  "ethereum",
-  "hyperevm",
-  "xlayer",
-  "sei",
-  "sonic"
-]New value: +[
+  "solana",
+  "base",
+  "arbitrum",
+  "robinhood",
+  "polygon",
+  "optimism",
+  "ethereum",
+  "hyperevm",
+  "xlayer",
+  "sei",
+  "sonic",
+  "monad",
+  "avalanche",
+  "cronos",
+  "injective",
+  "linea",
+  "aptos"
+]
  2. First observed

TDQS

A3.9/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare idempotentHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds real behavioral context beyond them: the call advances the workflow, the returned current_action is 'deeply verified' and comes with a wallet handoff, and the server never signs or submits. It stops short of 5 because error/partial-failure behavior is not described.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Four short sentences, front-loaded with the purpose before the example and the downstream guarantees; every sentence carries information. Slightly clipped phrasing ('Any next current_action is deeply verified') costs a little clarity but not substance.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given a heavy nested schema with 100% description coverage and an existing output schema, the description need not explain parameters or return values. It supplies the missing pieces: the workflow position (after source submission), the advancement semantics, and the no-signing/no-submission boundary.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and the schema already documents session_token, idempotency_key, transaction_hashes and verification_context in detail. The description's example ('one finalized source hash, a new idempotency key, and the original verification_context') only restates schema-level guidance, so the baseline of 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb+resource+ordering: 'Record source hashes the caller already signed and submitted, then advance the workflow.' The 'source' qualifier implicitly distinguishes it from assetfare_v2_session_observe_output (destination/output side), but no sibling is named explicitly, so it stops short of a 5.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The precondition is clear (caller has already signed and submitted the source transactions) and the worked example tells the caller exactly what to pass. There is no explicit when-not or named alternative (e.g. use session_observe_output for destination hashes), which keeps it at 4.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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