SAP MCP Server

Spl-token Freeze Account

spl-token_freezeAccount

Freeze a token account (prevents all transfers). Requires freeze authority. SAP MCP context: Protocol spl-token; operation class write. Use for SPL token deploy, mint, transfer, burn, freeze, thaw, and authority management. Confirm mint, decimals, authority, recipient, and amount before writes. Use token tools alongside SAP payments and settlement tools only when token operations are part of the agent service lifecycle.

SAP MCP execution guidance: Intent: SAP MCP tool workflow. Pricing: paid read-premium; estimate first, then use sap_payments_call_paid_tool when the runtime cannot replay x402 natively. Routing: hosted accountless write is blocked; do not call this as a paid hosted write and no x402 payment should be charged. Use the local sap_payments bridge or a hosted unsigned builder when user signing is required. Signer boundary: user-controlled local profile or external signer; OOBE hosted MCP remains non-custodial.

Input Schema

TableJSON Schema

Name	Required	Description
`mint`	Yes	Token mint address (base58)
`account`	Yes	Token account to freeze
`freezeAuthority`	Yes	Freeze authority wallet

Output Schema

TableJSON Schema

Name	Required	Description	Default
`content`	Yes	MCP content blocks returned to the caller.
`isError`	No	True when the tool result represents an application-level error.

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedJul 24, 2026

addedInput schema / description

Added value: +"Spl-token Freeze Account input schema. Intent: SAP MCP tool workflow. Pricing: paid read-premium; estimate first, then use sap_payments_call_paid_tool when the runtime cannot replay x402 natively. Routing: hosted accountless write is blocked; do not call this as a paid hosted write and no x402 payment should be charged. Use the local sap_payments bridge or a hosted unsigned builder when user signing is required. Signer boundary: user-controlled local profile or external signer; OOBE hosted MCP remains non-custodial. Use exact field names from this schema; do not guess aliases or include private key material."

First observedJul 13, 2026

TDQS

A3.6/5.0

Behavior3/5

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

Annotations indicate non-readonly and non-destructive. The description adds 'Requires freeze authority' and 'prevents all transfers', but does not mention reversibility or side effects. This adds some context beyond annotations but could be richer.

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?

The description is front-loaded with the core purpose in the first sentence. However, it includes extensive SAP MCP context and execution guidance which may be extraneous for an agent, but does not harm conciseness significantly.

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

Completeness3/5

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

The description explains the effect and authority requirement. With an output schema present, return values are defined. However, it omits error conditions (e.g., already frozen) and preconditions, making it adequate but not exhaustive.

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?

Input schema covers all three parameters with descriptions (100% coverage). The description does not add any new semantics beyond the schema, so baseline 3 is appropriate.

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

Purpose5/5

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

The description clearly states 'Freeze a token account (prevents all transfers). Requires freeze authority.' It specifies the verb 'freeze' and the resource 'token account', and distinguishes from siblings like thawAccount.

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

Usage Guidelines3/5

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

The description vaguely states 'Use for SPL token ... freeze, thaw, and authority management' but does not provide explicit when-to-use or when-not-to-use guidance. It lacks exclusions or alternatives, relying on implied context.

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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