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morpho_list_markets

Find Morpho Blue lending markets by collateral type or PT symbol. Filter by chain, sort by supply, and view subsidized borrow/supply rates from Merkl campaigns.

Instructions

Find Morpho Blue lending markets by collateral type.

Two search modes:

  1. PT collateral (default): Finds markets that accept Spectra/Pendle PT tokens as collateral. Use pt_symbol_filter to narrow (e.g., "USDC", "sUSDe"). Essential for looping strategies.

  2. Any collateral: Use collateral_filter to search ANY Morpho market by collateral symbol (e.g., "ynRWAx", "wstETH", "WETH"). Finds IBT, LST, and other collateral markets that pt_symbol_filter would miss. IMPORTANT: Many yield-bearing tokens (IBTs) have Morpho markets using the raw token as collateral, NOT the PT wrapper.

When both filters are provided, collateral_filter takes precedence (broader search).

Enriched with Merkl campaign data: shows subsidized borrow/supply rates when Merkl campaigns are active on the market's collateral or loan assets. Subsidized borrow rates can be NEGATIVE (Merkl pays borrowers), dramatically improving looping economics.

Protocol context:

  • LLTV = Liquidation Loan-to-Value. Threshold where liquidation CAN occur, NOT the safe operating level. Loop safely at ~90-95% of LLTV.

  • High utilization (>90%) means limited borrowing capacity.

  • Borrow rates are variable and can spike. Monitor when leveraged.

  • Morpho chains: mainnet, base, arbitrum, katana.

Use spectra_get_looping_strategy for leveraged yield calculation. Use morpho_get_rate for live borrow APY on a specific market key. Use spectra_scan_opportunities for automated cross-chain looping discovery.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
chainNoFilter by chain. Omit to search all Morpho-capable chains.
pt_symbol_filterNoFilter by PT symbol (e.g., 'USDC', 'reUSD'). Prepends 'PT-' to search. For non-PT collateral, use collateral_filter instead.
collateral_filterNoSearch ANY Morpho market by collateral symbol (e.g., 'ynRWAx', 'wstETH', 'WETH'). Does NOT prepend 'PT-'. Use this for IBT, LST, or any non-PT collateral markets.
min_supply_usdNoMinimum total supply in USD (default 0)
sort_byNoSort results (descending): supply, borrow_apy, or utilizationsupply
top_nNoNumber of results to return (default 10, max 50)
Behavior5/5

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

With no annotations, the description carries full burden and excels: it explains search modes, precedence, enriched Merkl data, subsidized rates (potentially negative), and protocol context like LLTV and utilization. It fully discloses behavior.

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

Conciseness5/5

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

The description is well-organized with sections (intro, search modes, enrichment, protocol context, alternatives). It is front-loaded with purpose and every sentence adds value. It is appropriately sized for the complexity.

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

Completeness5/5

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

Given the complexity (6 params, no output schema, many siblings), the description is complete: it explains search modes, enrichment, protocol context, and references related tools. It adequately covers what the tool returns and how to use it.

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

Parameters4/5

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

Schema coverage is 100% (baseline 3), but the description adds significant meaning beyond schema: it explains the two search modes in detail, the difference between pt_symbol_filter and collateral_filter, and precedence rule. It provides high-level guidance not in the schema.

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 the tool's purpose: 'Find Morpho Blue lending markets by collateral type.' It specifies the verb, resource, and scope, and distinguishes it from siblings like spectra_get_looping_strategy and morpho_get_rate.

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

Usage Guidelines5/5

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

The description provides explicit guidance on when to use this tool vs alternatives, e.g., 'Use spectra_get_looping_strategy for leveraged yield calculation. Use morpho_get_rate for live borrow APY.' It also explains the two search modes and when to use each.

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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