v0.2.0 · live
CAPFRAME
§ serversandboxfindings.v2

server-memory

npm:@modelcontextprotocol/server-memory@2026.1.26

github.com/modelcontextprotocol/servers

Score
C78
Findings
6
Tools
9
Last scan
2026-06-05

Severity breakdown

Critical0
High5
Medium1
Low0
Info0

Worst finding

Tool `create_entities` name implies a side effect that is not declared

· create_entities

`create_entities` looks like a side-effecting tool (its name contains a mutation verb), but its `side_effects` declaration is []. A policy synthesizer cannot produce safe rules for this tool because it cannot tell what it actually does.

fix: Declare the tool's true side effects explicitly. If the tool is genuinely read-only, rename it to match (e.g. `email.preview` rather than `email.send`).

All 6 findings

  1. high
    Tool `create_entities` name implies a side effect that is not declared· create_entitiesexcessive agency

    `create_entities` looks like a side-effecting tool (its name contains a mutation verb), but its `side_effects` declaration is []. A policy synthesizer cannot produce safe rules for this tool because it cannot tell what it actually does.

    fix: Declare the tool's true side effects explicitly. If the tool is genuinely read-only, rename it to match (e.g. `email.preview` rather than `email.send`).

  2. high
    Tool `create_relations` name implies a side effect that is not declared· create_relationsexcessive agency

    `create_relations` looks like a side-effecting tool (its name contains a mutation verb), but its `side_effects` declaration is []. A policy synthesizer cannot produce safe rules for this tool because it cannot tell what it actually does.

    fix: Declare the tool's true side effects explicitly. If the tool is genuinely read-only, rename it to match (e.g. `email.preview` rather than `email.send`).

  3. high
    Tool `delete_entities` name implies a side effect that is not declared· delete_entitiesexcessive agency

    `delete_entities` looks like a side-effecting tool (its name contains a mutation verb), but its `side_effects` declaration is []. A policy synthesizer cannot produce safe rules for this tool because it cannot tell what it actually does.

    fix: Declare the tool's true side effects explicitly. If the tool is genuinely read-only, rename it to match (e.g. `email.preview` rather than `email.send`).

  4. high
    Tool `delete_observations` name implies a side effect that is not declared· delete_observationsexcessive agency

    `delete_observations` looks like a side-effecting tool (its name contains a mutation verb), but its `side_effects` declaration is []. A policy synthesizer cannot produce safe rules for this tool because it cannot tell what it actually does.

    fix: Declare the tool's true side effects explicitly. If the tool is genuinely read-only, rename it to match (e.g. `email.preview` rather than `email.send`).

  5. high
    Tool `delete_relations` name implies a side effect that is not declared· delete_relationsexcessive agency

    `delete_relations` looks like a side-effecting tool (its name contains a mutation verb), but its `side_effects` declaration is []. A policy synthesizer cannot produce safe rules for this tool because it cannot tell what it actually does.

    fix: Declare the tool's true side effects explicitly. If the tool is genuinely read-only, rename it to match (e.g. `email.preview` rather than `email.send`).

  6. medium
    Tool `search_nodes` accepts unconstrained string input· search_nodesunconstrained input

    The following string parameter(s) have no `maxLength` constraint: `query`. Unbounded strings let an attacker stuff arbitrary payloads through the tool, including indirect-injection content.

    fix: Add a `maxLength` to each string property, or constrain with an `enum` or `pattern`. Most legitimate tool inputs fit under a few hundred bytes.

How this was scored

Source sandbox live tools/list captured in an ephemeral Docker container (parameter schemas included → R1/R2/R4 fire). Findings are emitted by the public capframe.findings.v1 schema. Score = 100 − (10·Critical + 4·High + 2·Medium + 1·Low), clamped to [0, 100].

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